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Animal husbandry
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Cattle feedlot
Cattle feedlot in Colorado, United States

Animal husbandry is the branch of agriculture concerned with animals that are raised for meat, fibre, milk, or other products. It includes day-to-day care, management, production, nutrition, selective breeding, and the raising of livestock. Husbandry has a long history, starting with the Neolithic Revolution when animals were first domesticated, from around 13,000 BC onwards, predating farming of the first crops. During the period of ancient societies like ancient Egypt, cattle, sheep, goats, and pigs were being raised on farms.

Major changes took place in the Columbian exchange, when Old World livestock were brought to the New World, and then in the British Agricultural Revolution of the 18th century, when livestock breeds like the Dishley Longhorn cattle and Lincoln Longwool sheep were rapidly improved by agriculturalists, such as Robert Bakewell, to yield more meat, milk, and wool. A wide range of other species, such as horse, water buffalo, llama, rabbit, and guinea pig, are used as livestock in some parts of the world. Insect farming, as well as aquaculture of fish, molluscs, and crustaceans, is widespread.

Modern animal husbandry relies on production systems adapted to the type of land available. Subsistence farming is being superseded by intensive animal farming in the more developed parts of the world, where, for example, beef cattle are kept in high-density feedlots, and thousands of chickens may be raised in broiler houses or batteries. On poorer soil, such as in uplands, animals are often kept more extensively and may be allowed to roam widely, foraging for themselves. Animal agriculture at modern scale drives climate change, ocean acidification, and biodiversity loss.

Most livestock are herbivores, except (among the most commonly-kept species) for pigs and chickens which are omnivores. Ruminants like cattle and sheep are adapted to feed on grass; they can forage outdoors or may be fed entirely or in part on rations richer in energy and protein, such as pelleted cereals. Pigs and poultry cannot digest the cellulose in forage and require other high-protein foods.

Etymology

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The verb to husband, meaning "to manage carefully", derives from an older meaning of husband, which in the 14th century referred to the ownership and care of a household or farm, but today means the "control or judicious use of resources", and in agriculture, the cultivation of plants or animals.[1] Farmers and ranchers who raise livestock are considered to practice animal husbandry.

History

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Further information: History of agriculture

Birth of husbandry

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Main articles: Neolithic Revolution and Domestication of animals
Fat-tailed sheep in Afghanistan
The domestication of ruminants, like these fat-tailed sheep in Afghanistan, provided nomads across the Middle East and central Asia with a reliable source of food.

The domestication of livestock was driven by the need to have food on hand when hunting was unproductive. The desirable characteristics of a domestic animal are that it should be useful to the domesticator, should be able to thrive in his or her company, should breed freely, and be easy to tend.[2] Domestication was not a single event, but a process repeated at various periods in different places. Sheep and goats were the animals that accompanied the nomads in the Middle East, while cattle and pigs were associated with more settled communities.[3] The first wild animal to be domesticated was the dog. Half-wild dogs, perhaps starting with young individuals, may have been tolerated as scavengers and killers of vermin, and being naturally pack hunters, were predisposed to become part of the human pack and join in the hunt. Prey animals, sheep, goats, pigs and cattle, were progressively domesticated early in the history of agriculture.[3] Pigs were domesticated in the Near East between 8,500 and 8000 BC,[4] sheep and goats in or near the Fertile Crescent about 8,500 BC,[5] and cattle from wild aurochs in the areas of modern Turkey and Pakistan around 8,500 BC.[6] A cow was a great advantage to a villager as she produced more milk than her calf needed, and her strength could be put to use as a working animal, pulling a plough to increase production of crops, and drawing a sledge, and later a cart, to bring the produce home from the field. Draught animals were first used about 4,000 BC in the Middle East, increasing agricultural production immeasurably.[3]

In southern Asia, the elephant was domesticated by 6,000 BC.[7] Fossilised chicken bones dated to 5040 BC have been found in northeastern China, far from where their wild ancestors lived in the jungles of tropical Asia, but archaeologists believe that the original purpose of domestication was for the sport of cockfighting.[8] Meanwhile, in South America, the llama and the alpaca had been domesticated, probably before 3,000 BC, as beasts of burden and for their wool. Neither was strong enough to pull a plough which limited the development of agriculture in the New World.[3] Horses occur naturally on the steppes of Central Asia and their domestication began around 3,000 BC in the Black Sea and Caspian Sea region. Although horses were originally seen as a source of meat, their use as pack animals and for riding followed. Around the same time, the wild ass was being tamed in Egypt. Camels were domesticated soon after this,[9] with the Bactrian camel in Mongolia and the Arabian camel becoming beasts of burden. By 1000 BC, caravans of Arabian camels were linking India with Mesopotamia and the Mediterranean.[3]

Ancient civilisations

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Egyptian hieroglyphic of cattle
Milking cattle in ancient Egypt

In ancient Egypt, cattle were the most important livestock, and sheep, goats, and pigs were also kept; poultry including ducks, geese, and pigeons were captured in nets and bred on farms, where they were force-fed with dough to fatten them.[10] The Nile provided a plentiful source of fish. Honey bees were domesticated from at least the Old Kingdom, providing both honey and wax.[11] In ancient Rome, all the livestock known in ancient Egypt were available. In addition, rabbits were domesticated for food by the first century BC. To help flush them out from their burrows, the polecat was domesticated as the ferret, its use described by Pliny the Elder.[12]

Medieval husbandry

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Painting of shepherd with sheep
Shepherd with sheep in woven hurdle pen. Medieval France. 15th century, Bodleian Library, MS Douce 195

In northern Europe, agriculture including animal husbandry went into decline when the Roman empire collapsed. Some aspects such as the herding of animals continued throughout the period. By the 11th century, the economy had recovered and the countryside was again productive.[13] The Domesday Book recorded every parcel of land and every animal in England: "there was not one single hide, nor a yard of land, nay, moreover ... not even an ox, nor a cow, nor a swine was there left, that was not set down in [the king's] writ."[14] For example, the royal manor of Earley in Berkshire, one of thousands of villages recorded in the book, had in 1086 "2 fisheries worth [paying tax of] 7s and 6d [each year] and 20 acres of meadow [for livestock]. Woodland for [feeding] 70 pigs."[15] The improvements of animal husbandry in the medieval period in Europe went hand in hand with other developments. Improvements to the plough allowed the soil to be tilled to a greater depth. Horses took over from oxen as the main providers of traction, new ideas on crop rotation were developed and the growing of crops for winter fodder gained ground.[16] Peas, beans and vetches became common; they increased soil fertility through nitrogen fixation, allowing more livestock to be kept.[17]

Columbian exchange

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Main article: Columbian exchange

Exploration and colonisation of North and South America resulted in the introduction into Europe of such crops as maize, potatoes, sweet potatoes and manioc, while the principal Old World livestock – cattle, horses, sheep and goats – were introduced into the New World for the first time along with wheat, barley, rice and turnips.[18]

Agricultural Revolution

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Main article: British Agricultural Revolution
Lincoln Longwool Sheep
The Lincoln Longwool breed was improved by Robert Bakewell in the 18th century.

Selective breeding for desired traits was established as a scientific practice by Robert Bakewell during the British Agricultural Revolution in the 18th century. One of his most important breeding programs was with sheep. Using native stock, he was able to quickly select for large, yet fine-boned sheep, with long, lustrous wool. The Lincoln Longwool was improved by Bakewell and in turn the Lincoln was used to develop the subsequent breed, named the New (or Dishley) Leicester. It was hornless and had a square, meaty body with straight top lines.[19] These sheep were exported widely and have contributed to numerous modern breeds. Under his influence, English farmers began to breed cattle for use primarily as beef. Long-horned heifers were crossed with the Westmoreland bull to create the Dishley Longhorn.[20]

The semi-natural, unfertilised pastures formed by traditional agricultural methods in Europe were managed by grazing and mowing. As the ecological impact of this land management strategy is similar to the impact of such natural disturbances as grazing and wildfire, this agricultural system shares many beneficial characteristics with a natural habitat, including the promotion of biodiversity. This strategy is declining in Europe today due to the intensification of agriculture. The mechanized and chemical methods used are causing biodiversity to decline.[21]

Practices

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Further information: Livestock

Systems

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Further information: Agriculture § Livestock production systems, and Intensive animal farming
Herdwick sheep
Herdwick sheep in an extensive hill farming system, Lake District, England

Traditionally, animal husbandry was part of the subsistence farmer's way of life, producing not only the food needed by the family but also the fuel, fertiliser, clothing, transport and draught power. Killing the animal for food was a secondary consideration, and wherever possible its products such as wool, eggs, milk and blood (by the Maasai) were harvested while the animal was still alive.[22] In the traditional system of transhumance, people and livestock moved seasonally between fixed summer and winter pastures; in montane regions the summer pasture was up in the mountains, the winter pasture in the valleys.[23]

Animals can be kept extensively or intensively. Extensive systems involve animals roaming at will, or under the supervision of a herdsman, often for their protection from predators. Ranching in the Western United States involves large herds of cattle grazing widely over public and private lands.[24] Similar cattle stations are found in South America, Australia and other places with large areas of land and low rainfall. Ranching systems have been used for sheep, deer, ostrich, emu, llama and alpaca.[25]

In the uplands of the United Kingdom, sheep are turned out on the fells in spring and graze the abundant mountain grasses untended, being brought to lower altitudes late in the year, with supplementary feeding being provided in winter.[26] In rural locations, pigs and poultry can obtain much of their nutrition from scavenging, and in African communities, hens may live for months without being fed, and still produce one or two eggs a week.[22]

Pigs in a barn
Pigs in an intensive system, Midwestern United States

At the other extreme, in the more developed parts of the world, animals are often intensively managed; dairy cows may be kept in zero-grazing conditions with all their forage brought to them; beef cattle may be kept in high density feedlots;[27] pigs may be housed in climate-controlled buildings and never go outdoors;[28] poultry may be reared in barns and kept in cages as laying birds under lighting-controlled conditions. In between these two extremes are semi-intensive, often family-run farms where livestock graze outside for much of the year, silage or hay is made to cover the times of year when the grass stops growing, and fertiliser, feed, and other inputs are brought onto the farm from outside.[29]

Feeding

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Main article: Animal feed
Cattle around an outdoor feeder
Cattle around an outdoor feeder

Animals used as livestock are predominantly herbivorous, the main exceptions being the pig and the chicken which are omnivorous. The herbivores can be divided into "concentrate selectors" which selectively feed on seeds, fruits and highly nutritious young foliage, "grazers" which mainly feed on grass, and "intermediate feeders" which choose their diet from the whole range of available plant material. Cattle, sheep, goats, deer and antelopes are ruminants; they digest food in two steps, chewing and swallowing in the normal way, and then regurgitating the semidigested cud to chew it again and thus extract the maximum possible food value.[30] The dietary needs of these animals is mostly met by eating grass. Grasses grow from the base of the leaf-blade, enabling it to thrive even when heavily grazed or cut.[31]

In many climates grass growth is seasonal, for example in the temperate summer or tropical rainy season, so some areas of the crop are set aside to be cut and preserved, either as hay (dried grass), or as silage (fermented grass).[32] Other forage crops are also grown and many of these, as well as crop residues, can be ensiled to fill the gap in the nutritional needs of livestock in the lean season.[33]

Cattle feed pellets
Cattle feed pellets of pressed linseed

Extensively reared animals may subsist entirely on forage, but more intensively kept livestock will require energy and protein-rich foods in addition. Energy is mainly derived from cereals and cereal by-products, fats and oils and sugar-rich foods, while protein may come from fish or meat meal, milk products, legumes and other plant foods, often the by-products of vegetable oil extraction.[34] Pigs and poultry are non-ruminants and unable to digest the cellulose in grass and other forages, so they are fed entirely on cereals and other high-energy foodstuffs. The ingredients for the animals' rations can be grown on the farm or can be bought, in the form of pelleted or cubed, compound foodstuffs specially formulated for the different classes of livestock, their growth stages and their specific nutritional requirements. Vitamins and minerals are added to balance the diet.[35] Farmed fish are usually fed pelleted food.[35]

Breeding

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Main article: Animal breeding

The breeding of farm animals seldom occurs spontaneously but is managed by farmers with a view to encouraging traits seen as desirable. These include hardiness, fertility, docility, mothering abilities, fast growth rates, low feed consumption per unit of growth, better body proportions, higher yields, and better fibre qualities. Undesirable traits such as health defects and aggressiveness are selected against.[36][37]

Selective breeding has been responsible for large increases in productivity. For example, in 2007, a typical broiler chicken at eight weeks old was 4.8 times as heavy as a bird of similar age in 1957,[36] while in the thirty years to 2007, the average milk yield of a dairy cow in the United States nearly doubled.[36]

Animal health

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Further information: Veterinary medicine
Vaccination of a goat
Vaccinating a goat, Niger

Good husbandry, proper feeding, and hygiene are the main contributors to animal health on the farm, bringing economic benefits through maximised production. When, despite these precautions, animals still become sick, they are treated with veterinary medicines, by the farmer and the veterinarian. In the European Union, when farmers treat their own animals, they are required to follow the guidelines for treatment and to record the treatments given.[38] Animals are susceptible to a number of diseases and conditions that may affect their health. Some, like classical swine fever[39] and scrapie[40] are specific to one type of stock, while others, like foot-and-mouth disease affect all cloven-hoofed animals.[41] Animals living under intensive conditions are prone to internal and external parasites; increasing numbers of sea lice are affecting farmed salmon in Scotland.[42] Reducing the parasite burdens of livestock results in increased productivity and profitability.[43]

Where the condition is serious, governments impose regulations on import and export, on the movement of stock, quarantine restrictions and the reporting of suspected cases. Vaccines are available against certain diseases, and antibiotics are widely used where appropriate. At one time, antibiotics were routinely added to certain compound foodstuffs to promote growth, but this practice is now frowned on in many countries because of the risk that it may lead to antimicrobial resistance in livestock and in humans.[44]

Watercolor drawing of farmyard with cow, horse, pigs, and chickens
Familiar livestock: ink and watercolour drawing of a farmyard with cow, horse, pigs, and chickens, 1869

Governments are concerned with zoonoses, diseases that humans may acquire from animals. Wild animal populations may harbour diseases that can affect domestic animals which may acquire them as a result of insufficient biosecurity. An outbreak of Nipah virus in Malaysia in 1999 was traced back to pigs becoming ill after contact with fruit-eating flying foxes, their faeces and urine. The pigs in turn passed the infection to humans.[45] Avian flu H5N1 is present in wild bird populations and can be carried large distances by migrating birds. This virus is easily transmissible to domestic poultry, and to humans living in close proximity with them. Other infectious diseases affecting wild animals, farm animals and humans include rabies, leptospirosis, brucellosis, tuberculosis and trichinosis.[46]

Range of species

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Main articles: Livestock § Types, Aquaculture § Species groups, and Entomophagy

There is no single universally agreed definition of which species are livestock. Widely agreed types of livestock include cattle for beef and dairy, sheep, goats, pigs, and poultry. Various other species are sometimes considered livestock, such as horses,[47] while poultry birds are sometimes excluded. In some parts of the world, livestock includes species such as buffalo, and the South American camelids, the alpaca and llama.[48][49][50] Some authorities use much broader definitions to include fish in aquaculture, micro-livestock such as rabbits and rodents like guinea pigs, as well as insects from honey bees to crickets raised for human consumption.[51]

Sheering merino sheep
Shearing a Merino sheep for its wool

Products

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Main article: Animal product

Animals are raised for a wide variety of products, principally meat, wool, milk, and eggs, but also including tallow, isinglass and rennet.[52][53] Animals are also kept for more specialised purposes, such as to produce vaccines[54] and antiserum (containing antibodies) for medical use.[55] Where fodder or other crops are grown alongside animals, manure can serve as a fertiliser, returning minerals and organic matter to the soil in a semi-closed organic system.[56]

Branches

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Dairy

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Main article: Dairy farming
Rotary milking parlour
A modern rotary milking parlour, Germany

Although all mammals produce milk to nourish their young, the cow is predominantly used throughout the world to produce milk and milk products for human consumption. Other animals used to a lesser extent for this purpose include sheep, goats, camels, buffaloes, yaks, reindeer, horses and donkeys.[57]

All these animals have been domesticated over the centuries, being bred for such desirable characteristics as fecundity, productivity, docility and the ability to thrive under the prevailing conditions. Whereas in the past cattle had multiple functions, modern dairy cow breeding has resulted in specialised Holstein Friesian-type animals that produce large quantities of milk economically. Artificial insemination is widely available to allow farmers to select for the particular traits that suit their circumstances.[58]

Whereas in the past cows were kept in small herds on family farms, grazing pastures and being fed hay in winter, nowadays there is a trend towards larger herds, more intensive systems, the feeding of silage and "zero grazing", a system where grass is cut and brought to the cow, which is housed year-round.[59]

In many communities, milk production is only part of the purpose of keeping an animal which may also be used as a beast of burden or to draw a plough, or for the production of fibre, meat and leather, with the dung being used for fuel or for the improvement of soil fertility. Sheep and goats may be favoured for dairy production in climates and conditions that do not suit dairy cows.[57]

Meat

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Hereford cow
The Hereford is a hardy breed of beef cattle, now raised in many countries around the world.
Main article: Meat industry

Meat, mainly from farmed animals, is a major source of dietary protein and essential nutrients around the world, averaging about 8% of human energy intake.[60] The actual types eaten depend on local preferences, availability, cost and other factors, with cattle, sheep, pigs and goats being the main species involved. Cattle generally produce a single offspring annually which takes more than a year to mature; sheep and goats often have twins and these are ready for slaughter in less than a year; pigs are more prolific, producing more than one litter of up to about 11[61] piglets each year.[62] Horses, donkeys, deer, buffalo, llamas, alpacas, guanacos and vicunas are farmed for meat in various regions. Some desirable traits of animals raised for meat include fecundity, hardiness, fast growth rate, ease of management and high food conversion efficiency. About half of the world's meat is produced from animals grazing on open ranges or on enclosed pastures, the other half being produced intensively in various factory-farming systems; these are mostly cows, pigs or poultry, and often reared indoors, typically at high densities.[63]

Poultry

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Battery hens
Battery hens, Brazil
Main article: Poultry farming

Poultry, kept for their eggs and for their meat, include chickens, turkeys, geese and ducks. The great majority of laying birds used for egg production are chickens. Methods for keeping layers range from free-range systems, where the birds can roam as they will but are housed at night for their own protection, through semi-intensive systems where they are housed in barns and have perches, litter and some freedom of movement, to intensive systems where they are kept in cages. The battery cages are arranged in long rows in multiple tiers, with external feeders, drinkers, and egg collection facilities. This is the most labour saving and economical method of egg production but has been criticised on animal welfare grounds as the birds are unable to exhibit their normal behaviours.[64]

In the developed world, the majority of the poultry reared for meat is raised indoors in big sheds, with automated equipment under environmentally controlled conditions. Chickens raised in this way are known as broilers, and genetic improvements have meant that they can be grown to slaughter weight within six or seven weeks of hatching. Newly hatched chicks are restricted to a small area and given supplementary heating. Litter on the floor absorbs the droppings and the area occupied is expanded as they grow. Feed and water is supplied automatically and the lighting is controlled. The birds may be harvested on several occasions or the whole shed may be cleared at one time.[65]

A similar rearing system is usually used for turkeys, which are less hardy than chickens, but they take longer to grow and are often moved on to separate fattening units to finish.[66] Ducks are particularly popular in Asia and Australia and can be killed at seven weeks under commercial conditions.[67]

Aquaculture

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Freshwater fish farm
Freshwater fish farming, France
Main article: Aquaculture

Aquaculture has been defined as "the farming of aquatic organisms including fish, molluscs, crustaceans and aquatic plants and implies some form of intervention in the rearing process to enhance production, such as regular stocking, feeding, protection from predators, etc. Farming also implies individual or corporate ownership of the stock being cultivated."[68] In practice it can take place in the sea or in freshwater, and be extensive or intensive. Whole bays, lakes or ponds may be devoted to aquaculture, or the farmed animal may be retained in cages (fish), artificial reefs, racks or strings (shellfish). Fish and prawns can be cultivated in rice paddies, either arriving naturally or being introduced, and both crops can be harvested together.[69]

Fish hatcheries provide larval and juvenile fish, crustaceans and shellfish, for use in aquaculture systems. When large enough these are transferred to growing-on tanks and sold to fish farms to reach harvest size. Some species that are commonly raised in hatcheries include shrimps, prawns, salmon, tilapia, oysters and scallops. Similar facilities can be used to raise species with conservation needs to be released into the wild, or game fish for restocking waterways. Important aspects of husbandry at these early stages include selection of breeding stock, control of water quality and nutrition. In the wild, there is a massive amount of mortality at the nursery stage; farmers seek to minimise this while at the same time maximising growth rates.[70]

Insects

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Crickets
Crickets being raised for human consumption, Thailand
Further information: Beekeeping, Entomophagy, Insect farming, and Sericulture

Bees have been kept in hives since at least the First Dynasty of Egypt, five thousand years ago,[71] and man had been harvesting honey from the wild long before that. Fixed comb hives are used in many parts of the world and are made from any locally available material.[72] In more advanced economies, where modern strains of domestic bee have been selected for docility and productiveness, various designs of hive are used which enable the combs to be removed for processing and extraction of honey. Quite apart from the honey and wax they produce, honey bees are important pollinators of crops and wild plants, and in many places hives are transported around the countryside to assist in pollination.[73]

Sericulture, the rearing of silkworms, was first adopted by the Chinese during the Shang dynasty.[74] The only species farmed commercially is the domesticated silkmoth. When it spins its cocoon, each larva produces an exceedingly long, slender thread of silk. The larvae feed on mulberry leaves and in Europe, only one generation is normally raised each year as this is a deciduous tree. In China, Korea and Japan however, two generations are normal, and in the tropics, multiple generations are expected. Most production of silk occurs in the Far East, with a synthetic diet being used to rear the silkworms in Japan.[75]

Insects form part of the human diet in many cultures.[76] In Thailand, crickets are farmed for this purpose in the north of the country, and palm weevil larvae in the south. The crickets are kept in pens, boxes or drawers and fed on commercial pelleted poultry food, while the palm weevil larvae live on cabbage palm and sago palm trees, which limits their production to areas where these trees grow.[77] Another delicacy of this region is the bamboo caterpillar, and the best rearing and harvesting techniques in semi-natural habitats are being studied.[77]

Effects

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Environmental impact

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Main articles: Environmental impact of livestock and Environmental impact of meat production
Cattle
Livestock production requires large areas of land.

Animal husbandry has a significant impact on the world environment. Both production and consumption of animal products have increased rapidly. Since 1950, meat production has tripled, whereas the production of dairy products doubled and that of eggs almost increased fourfold.[78] Meanwhile, meat consumption has nearly doubled worldwide. Developing countries had a surge in meat consumption, particularly of monogastric livestock.[79] Animal husbandry drives climate change, ocean acidification, and biodiversity loss, and kills 60 billion animals annually.[80] It uses between 20 and 33% of the world's fresh water,[81] Livestock, and the production of feed for them, occupy about a third of the Earth's ice-free land.[82] Livestock production contributes to species extinction, desertification,[83] and habitat destruction.[84] and is the primary driver of the Holocene extinction.[85][86][87][88][89] Some 70% of the agricultural land and 30% of Earth's land surface is involved directly or indirectly in animal husbandry.[90] Habitat is destroyed by clearing forests and converting land to grow feed crops and for grazing, while predators and herbivores are frequently targeted because of a perceived threat to livestock profits; for example, animal husbandry causes up to 91% of the deforestation in the Amazon region.[91] In addition, livestock produce greenhouse gases. Cows produce some 570 million cubic metres of methane per day,[92] that accounts for 35 to 40% of the overall methane emissions of the planet.[93] Further, livestock production is responsible for 65% of all human-related emissions of nitrous oxide.[93][94][60]

Animal welfare

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Main article: Animal welfare

Since the 18th century, people have become increasingly concerned about the welfare of farm animals. Possible measures of welfare include longevity, behavior, physiology, reproduction, freedom from disease, and freedom from immunosuppression. Standards and laws for animal welfare have been created worldwide, broadly in line with the most widely held position in the western world, a form of utilitarianism: that it is morally acceptable for humans to use non-human animals, provided that no unnecessary suffering is caused, and that the benefits to humans outweigh the costs to the livestock. An opposing view is that animals have rights, should not be regarded as property, are not necessary to use, and should never be used by humans.[95][96][97][98][99] Live export of animals has risen to meet increased global demand for livestock such as in the Middle East. Animal rights activists have objected to long-distance transport of animals; one result was the banning of live exports from New Zealand in 2003.[100]

In culture

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Cartoon of John Bull giving his breeches to save his bacon
Opening of the budget; – or – John Bull giving his breeches to save his bacon[note 1] by James Gillray (d. 1815)

Since the 18th century, the farmer John Bull has represented English national identity, first in John Arbuthnot's political satires, and soon afterwards in cartoons by James Gillray and others including John Tenniel. He likes food, beer, dogs, horses, and country sports; he is practical and down to earth, and anti-intellectual.[101]

Farm animals are widespread in books and songs for children; the reality of animal husbandry is often distorted, softened, or idealized, giving children an almost entirely fictitious account of farm life. The books often depict happy animals free to roam in attractive countryside, a picture completely at odds with the realities of the impersonal, mechanized activities involved in modern intensive farming.[102]

Illustration of dressed pigs
Dressed pigs in Beatrix Potter's 1913 The Tale of Pigling Bland

Pigs, for example, appear in several of Beatrix Potter's "little books", as Piglet in A.A. Milne's Winnie the Pooh stories, and somewhat more darkly (with a hint of animals going to slaughter) as Babe in Dick King-Smith's The Sheep-Pig, and as Wilbur in E. B. White's Charlotte's Web.[103] Pigs tend to be "bearers of cheerfulness, good humour and innocence". Many of these books are completely anthropomorphic, dressing farm animals in clothes and having them walk on two legs, live in houses, and perform human activities.[102] The children's song "Old MacDonald Had a Farm" describes a farmer named MacDonald and the various animals he keeps, celebrating the noises they each make.[104]

Many urban children experience animal husbandry for the first time at a petting farm; in Britain, some five million people a year visit a farm of some kind. This presents some risk of infection, especially if children handle animals and then fail to wash their hands; a strain of E. coli infected 93 people who had visited a British interactive farm in an outbreak in 2009.[105] Historic farms such as those in the United States offer farmstays and "a carefully curated version of farming to those willing to pay for it",[106] sometimes giving visitors a romanticised image of a pastoral idyll from an unspecified time in the pre-industrial past.[106]

See also

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Notes

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References

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[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Animal husbandry

View on Grokipedia
from Grokipedia
Animal husbandry is the branch of dealing with the breeding, raising, and management of domestic animals, especially for , milk, fiber, eggs, and other products. Originating during the approximately 10,000 years ago with the of species such as dogs, , sheep, and , it enabled settled human societies by supplying consistent , labor, and materials essential for and . Key practices encompass for desirable traits, nutritional optimization to enhance growth and reproduction, veterinary interventions including vaccinations and parasite control, and housing systems ranging from pasture-based to confined feeding operations that boost efficiency in high-demand production. Economically, animal husbandry underpins global protein supply—accounting for about one-third of human intake—and sustains livelihoods for over a billion people through in farming, processing, and related industries, though it faces challenges like disease outbreaks and resource demands that necessitate ongoing innovations in sustainable management. Defining characteristics include the causal link between rigorous care protocols and productivity gains, as evidenced by reduced mortality and higher yields from evidence-based feeding and health regimens, contrasting with suboptimal practices that lead to inefficiencies.

Definition and Fundamentals

Definition and Scope

Animal husbandry is the branch of focused on the breeding, rearing, feeding, sheltering, and management of domesticated animals to produce food, fiber, draft power, and other commodities for human use. This practice integrates biological, nutritional, and genetic principles to optimize animal health, , and productivity while adapting to environmental and economic constraints. The scope encompasses a wide array of species, including large mammals such as cattle, sheep, goats, pigs, and horses; poultry like chickens and turkeys; and aquatic species in aquaculture systems, with emerging inclusion of insects for protein production. Core activities involve for desirable traits like higher yield or faster growth, nutritional management to meet metabolic needs, prevention through and , and housing systems ranging from pasture-based to confined intensive operations. These elements ensure sustainable output, with global production supplying approximately 17% of the world's kilocalories and 34% of protein from animal sources as of recent FAO assessments underlying sector analyses. Economically, animal husbandry drives significant value, contributing nearly 50% of agricultural in high-income countries and supporting rural livelihoods through , , and byproducts that generated over $1 trillion in global trade value in 2022. In the United States, for instance, sectors including and accounted for about 45% of total cash receipts in 2023, underscoring its role in and for millions. While intensive systems have boosted efficiency—evidenced by U.S. production rising from 2.5 billion birds in 1960 to over 9 billion in 2023—the scope also addresses challenges like resource use and through evidence-based improvements in and health protocols.

Etymology and Key Terminology

The term husbandry entered English around 1300 from Middle English husbonderie or husbandrie, denoting the management of a household estate, derived ultimately from Old Norse húsbóndi, combining hús ("house") and bóndi ("to dwell, till the soil, or manage"). By the 14th century, it broadened to encompass farming practices, including tillage and the rearing of livestock for profit, reflecting the role of a husbandman—a freeholder or tiller of the soil responsible for prudent resource stewardship. The verb to husband, meaning to manage or conserve carefully, stems from this agrarian sense of ownership and oversight, predating its application solely to marital contexts. Animal husbandry thus refers to the branch of agriculture focused on the breeding, maintenance, and utilization of domesticated animals for human benefit, such as meat, milk, eggs, wool, leather, or draft power, emphasizing selective care to maximize productivity while minimizing waste. Key terminology includes livestock, defined as domesticated animals raised in agricultural settings to produce commodities like food, fiber, or labor, excluding companion or wild species. Domestication describes the genetic and behavioral adaptation of wild species over generations to thrive under human control, beginning around 13,000 BCE with taxa like sheep and cattle, enabling sustained herding rather than hunting. Other essential terms encompass , the deliberate mating of animals with desirable traits to propagate genetic qualities such as higher milk yield or disease resistance, practiced systematically since antiquity; parturition, the act of giving birth (e.g., calving in or farrowing in ); and , the removal of substandard or surplus animals via slaughter or sale to optimize herd health and efficiency. Species-specific descriptors include bovine for -related matters, caprine for goats, ovine for sheep, porcine for pigs, and for birds like chickens or turkeys kept for eggs or meat. These terms underscore the field's emphasis on empirical management for economic viability, rooted in observable traits and outcomes rather than abstract ideals.

Historical Development

Origins and Birth of Husbandry

The practice of animal husbandry emerged during the , approximately 12,000 to 10,000 years ago, as hunter-gatherer groups in the began managing wild animal populations for sustained exploitation rather than opportunistic hunting. This shift coincided with the of plants and marked a transition to sedentary lifestyles, where animals were corralled, bred selectively, and integrated into human settlements for meat, milk, wool, and traction. Archaeological evidence from sites like in modern-day Turkey and early villages in the indicates initial herding of gazelle and other ungulates around 11,000 BCE, preceding full domestication but laying the groundwork for controlled breeding. Among the earliest domesticated species were goats (Capra aegagrus) and sheep (Ovis orientalis), with genetic and osteological evidence from the —such as reduced horn size, altered , and increased population densities in human-associated strata—dating to around 10,500–9,000 BCE at sites like in and Zawi Chemi Shanidar in . These animals were initially valued for meat and skins, with later emphasis on and emerging by 8,000 BCE, as inferred from residues in and for in human populations. Pigs (Sus scrofa) and (Bos primigenius) followed closely, with evidence from Çayönü and Hallan Çemi in southeastern around 9,000 BCE, showing mandibular changes and dental wear patterns consistent with stall-feeding and human-dependent reproduction. Dogs (Canis familiaris), derived from gray wolves (Canis lupus), represent the inaugural domestication event, predating livestock by millennia, with cranial morphology shifts and from Eurasian sites like Bonn-Oberkassel in indicating divergence as early as 15,000–14,000 years ago. Initially serving as aides and camp in a commensal relationship, dogs facilitated the later husbandry of herd animals by aiding in and predator deterrence, though their role was distinct from economic management. This sequence underscores a gradual process driven by population pressures and resource scarcity, rather than sudden innovation, with isotopic analysis of bones revealing dietary shifts toward human-provided forage by 8,000 BCE.

Developments in Ancient Civilizations

In the ancient Near East, particularly Mesopotamia, animal husbandry evolved from Neolithic domestications into organized systems by the 4th-3rd millennia BCE, with cuneiform tablets recording detailed livestock inventories, including sheep counts and herd movements essential for temple economies and state administration. Sheep and goat herds were centrally managed in large numbers, reflecting economic exploitation through wool, milk, and meat production, as evidenced by administrative texts from the Early Dynastic period (c. 2900-2350 BCE). Goats, domesticated around 8000 BCE in the Fertile Crescent, were prioritized for early livestock systems, supporting pastoral mobility and agricultural surplus. In , from (c. 2686-2181 BCE), cattle husbandry integrated deeply with , using oxen for plowing the floodplains and providing milk, meat, and hides, as depicted in reliefs and hieroglyphs showing herding and slaughter practices. management included potential selective crossing of breeds to enhance traits like or , though evidence remains archaeological rather than textual. Royal and temple estates oversaw large herds, with forced feeding techniques applied to species like geese and pigs to boost yields, underscoring husbandry's role in sustaining pharaonic economies and rituals. The Indus Valley Civilization (c. 2600-1900 BCE) featured specialized bovine husbandry, with and dominating faunal assemblages at sites like , where isotopic analysis of enamel indicates managed grazing and dairy exploitation, as females were often retained until maturity. Sheep, , and pigs supplemented herds, but bovines' prevalence suggests their use for traction, , and symbolic status, with archaeological bone distributions varying regionally to adapt to local ecologies. This system supported urban densities without evident overexploitation, highlighting in a monsoon-dependent environment.

Medieval and Early Modern Husbandry

In medieval , animal husbandry was deeply integrated into the manorial system, where peasants and serfs managed on communal pastures and fields under the oversight of lords and monasteries. Oxen served as primary draft animals for plowing heavy northern European soils, often requiring teams of eight to operate effectively, while sheep provided and essential to the economy, with practices facilitating seasonal movement in regions like medieval . Pigs roamed urban and rural areas, necessitating regulations to prevent them from damaging crops or public spaces, as seen in late medieval towns where local governments imposed controls on swine rearing. , sheep, and faced recurrent plagues, with early medieval records indicating significant losses that disrupted draft power and food supplies. Horses gradually supplemented oxen for traction during the period, though oxen remained preferred due to lower maintenance costs and higher resale value after work, particularly in where husbandry encompassed , sheep, , pigs, and alongside . Open-field systems dominated, allowing animals to graze on and stubble after , which supported but limited and improvements due to shared . Archaeological evidence from sites reveals consistent management for , , and labor, with urban ensuring fresh slaughter for markets. During the early , from the sixteenth century onward, husbandry underwent transformations driven by enclosures that privatized common lands, enabling more efficient management and in and parts of . This shift facilitated innovations like turnip fodder to sustain animals year-round, crop rotations incorporating , and an observed increase in animal sizes, alongside introductions such as the for diversification. By the seventeenth century, initial efforts at emerged, setting the stage for intensified production through better and reduced via controlled environments. Enclosures boosted overall agricultural output, including animal products, by allowing specialization, though they displaced smallholders reliant on .

The Agricultural and Industrial Revolutions

The Agricultural Revolution in Britain, from the late 17th to the mid-19th century, transformed animal husbandry through land management reforms and breeding innovations that boosted livestock productivity to meet rising food demands. Parliamentary Enclosure Acts, enacted primarily between 1760 and 1820, privatized over 7,000 square kilometers of common lands annually in peak years, consolidating fragmented open fields into enclosed farms with hedges and fences. This shift enabled farmers to exclude inferior animals, implement controlled grazing, and apply selective breeding without genetic dilution from communal herds, resulting in more efficient resource use and higher yields per animal. Central to these advancements was the work of Robert Bakewell (1725–1795), who systematized by mating animals with proven superior traits—such as faster weight gain and finer wool—and employing to intensify those characteristics. Bakewell's Dishley Longhorn cattle and New Leicester sheep exemplified this approach; the latter breed achieved carcasses weighing up to 90 kilograms at maturity, compared to prior averages of around 30 kilograms, through rigorous progeny testing and of subpar offspring. His methods, disseminated via progeny auctions and leases of superior , spread rapidly, influencing and laying the empirical foundation for modern in improvement. The subsequent (circa 1760–1840) amplified these gains by creating urban markets that incentivized further intensification, though direct mechanization in husbandry lagged behind crops. Railways, expanding from 1830 onward, reduced livestock transport times from weeks to days, enabling live animal shipments to cities and preserving meat quality without spoilage, which spurred herd expansions and specialized dairy operations near industrial centers. Complementary practices, like the Norfolk four-field rotation incorporating fodder crops such as turnips and clover, sustained larger overwintered herds by providing feed and natural fertilization, indirectly supporting the labor surplus that fueled factory growth. Veterinary advancements, including the 1791 establishment of the Royal Veterinary College in , began addressing epidemic diseases systematically, reducing mortality and enhancing herd viability amid scaled production. These developments collectively increased Britain's meat output by an estimated 50–100% over the century, underpinning from 6 million in 1750 to 21 million by 1850.

Modern Intensification Post-1945

Post-World War II intensification of animal husbandry marked a transition from extensive, pasture-based systems to confined, industrialized operations designed to maximize output efficiency amid rising global demand for , , and eggs. This shift was propelled by doubling between 1950 and 2000, , and income increases in developing regions, which tripled per capita consumption in some areas from the 1970s to 1990s. Technological advancements, including in feeding and , concentrated feed from surplus grains, and genetic selection for rapid growth, enabled higher stocking densities and reduced production costs. Central to this era were innovations in animal health and nutrition. The discovery and widespread adoption of antibiotics and post-1945 minimized in high-density environments, with the U.S. FDA approving penicillin and for use in additives in 1951 to promote growth and prevent infections. These allowed for confinement systems where animals were housed indoors year-round, contrasting with traditional outdoor rearing. Genetic improvements complemented this, yielding carcass weight increases of approximately 30% for chickens and from the early 1960s to mid-2000s, and 20% for pigs, through programs focused on feed efficiency and lean meat yield. and swine sectors led the adoption, with often utilizing outdoor feedlots supplemented by formulated feeds. In the United States, the broiler chicken industry exemplifies rapid industrialization. The "Chicken of Tomorrow" contest initiated post-1945 spurred hybrid breeding for meat production, transitioning from small, dual-purpose flocks to vertically integrated operations by the 1960s, where companies controlled breeding, , growing, and processing. U.S. broiler production expanded dramatically, supported by confinement and nutritional formulations, achieving growth rates that reduced time to market from 16 weeks in the 1940s to about 6-7 weeks by 2000. Similarly, swine production shifted to total confinement systems, with farrow-to-finish facilities enabling year-round breeding and minimizing ; by the late , over 90% of U.S. pigs were raised in such mega-operations. Beef cattle feeding also intensified via commercial s emerging in the , leveraging surplus corn from expanded U.S. grain production to fatten rapidly in confined yards rather than open ranges. The first large Plains opened near , in the early , scaling to capacities of thousands of head by the , which boosted feed efficiency but concentrated outputs. operations adopted mechanized parlors and total mixed rations, increasing yields per cow from about 5,000 pounds annually in 1950 to over 20,000 by 2000 through breeding and management. Globally, these practices proliferated from industrialized nations to developing ones, with FAO data showing meat production rising fastest from 1961 to 2001, followed by , while meats grew more modestly in line with trends. Farm consolidation accelerated: for instance, numbers of and farms declined sharply in countries like and , offset by larger-scale units classified as concentrated animal feeding operations (CAFOs). By the early 21st century, the U.S. hosted approximately 25,000 CAFOs, handling nearly all commercial , reflecting a systemic move toward industrial-scale husbandry.

Core Practices

Husbandry Systems and Management

Animal husbandry systems are broadly categorized into extensive, semi-intensive, and intensive based on resource utilization, animal confinement levels, and production objectives. Extensive systems rely on natural with minimal supplementary inputs, prevalent in regions with abundant but low per animal. Intensive systems employ high-density confinement and controlled inputs to maximize output , dominating modern commercial production. Semi-intensive systems combine elements of both, offering a balance through partial supplemented by provided feeds. Extensive systems, including and ranching, involve low stocking densities where animals derive most from rangelands or pastures, supporting approximately 200 million households globally on 25% of the world's land surface. These systems exhibit lower operational costs and align with natural behaviors, potentially reducing environmental pressures per animal through lower feed transport emissions, though overall productivity remains limited by land availability and climatic variability. Intensive systems confine animals in structures like feedlots or barns, providing formulated diets and veterinary interventions to achieve rapid growth and high yields; for instance, they have driven the global shift toward increased output to meet rising demand, with confined systems contributing to gains in feed conversion. While enabling —such as in where battery systems produce over 90% of eggs in some nations—these systems demand substantial inputs like grains and , raising concerns over antibiotic resistance and localized when mismanaged, though per-unit emissions can be lower due to optimized . Semi-intensive systems integrate pasture access with confinement phases or supplemental feeding, common in mixed crop-livestock farms, allowing moderate densities that enhance via while mitigating some intensive risks like overcrowding. These approaches support diversified operations, as seen in that boosts productivity by up to 30% compared to continuous use. Effective management across systems encompasses daily monitoring of , , and to optimize productivity and mitigate risks. Core practices include protocols to prevent outbreaks, precise ration formulation for feed —achieving up to 20% improvements in growth rates—and record-keeping for genetic selection and performance tracking. In intensive setups, automated systems like ventilation and waste removal enhance labor , while extensive management emphasizes and herd surveillance via , reducing mortality by 15-25% in targeted programs. Sustainable oversight also involves management to minimize nutrient runoff, aligning productivity with environmental constraints.

Feeding and Nutritional Strategies

Feeding strategies in animal husbandry aim to meet species-specific nutritional requirements for maintenance, growth, reproduction, and production while optimizing feed efficiency and minimizing environmental impacts. Livestock require balanced rations providing energy, protein, fiber, vitamins, minerals, and water, with formulations adjusted for physiological stage, such as lactation or finishing. Ruminants like cattle and sheep utilize microbial fermentation in the rumen to digest fibrous forages, deriving energy from volatile fatty acids produced from cellulose breakdown, whereas monogastrics such as pigs and poultry depend on enzymatic digestion of concentrates for rapid nutrient absorption. For ruminants, primary feeds include pastures, hay, , and crop residues, supplemented with grains or protein sources when quality is low, as microbes require , , and for optimal protein synthesis from non-protein nitrogen. Nutritional needs vary by production phase; for instance, lactating cows demand higher energy densities to support yield, often met through total mixed rations balancing roughage and concentrates to prevent acidosis. In extensive systems, maximizes intake, while intensive feedlots use high-concentrate diets to achieve feed conversion ratios around 6-7 kg per kg gain in . Monogastric animals require precise diets with higher digestible protein and energy from grains like corn and soybeans, as they lack ruminal and cannot efficiently utilize high-fiber feeds. Poultry achieve feed efficiencies of 1.5-2 kg feed per kg body weight gain through formulated mash or pellets rich in such as and , while pigs typically require 2.5-3 kg feed per kg gain, with phase-feeding adjusting crude protein levels to match growth stages and reduce excretion by up to 30%. access is critical across , with needing 30-50 liters daily per animal depending on diet and climate. Modern strategies incorporate precision feeding technologies, using sensors and data analytics to tailor nutrient delivery to individual animals, improving efficiency by 10-20% and reducing waste; for example, automated systems monitor intake and adjust rations based on real-time phenotypic data like body weight and rumen pH. Additives such as ionophores enhance rumen fermentation in cattle, boosting energy utilization, while probiotics support gut health in pigs and poultry to mitigate stress and improve feed conversion.
SpeciesTypical Feed Conversion Ratio (kg feed/kg gain)Primary Feed Types
Poultry1.5-2Grain-based concentrates
Pigs2.5-3Balanced grains and proteins
Sheep4-6Forages with supplements
Cattle6-10Forages and high-energy grains in finishing
These approaches prioritize empirical balancing over generic feeding, ensuring causal links between diet composition and performance outcomes like growth rates and product yield.

Breeding, Selection, and Reproduction

in animal husbandry involves the deliberate choice of parent animals with desirable traits to produce offspring that enhance productivity, such as increased milk yield in or faster growth rates in pigs and . This process relies on principles of and quantitative trait analysis, where traits like feed efficiency and disease resistance are targeted through methods including mass selection, pedigree selection, and progeny testing. Pioneered systematically by Robert Bakewell in the late with sheep and , has accelerated genetic gains, but intensive focus on production traits can correlate with unintended health declines, such as leg disorders in chickens or reduced fertility in . Reproduction in livestock is managed through both natural mating and assisted technologies to maximize genetic dissemination. (AI), first successfully applied to in the early 1900s, allows semen from superior sires to be used across multiple females, with conception rates typically ranging from 50-70% in herds under optimal conditions. In , AI usage remains lower at about 5% in the U.S. due to pasture-based systems, though timed AI protocols improve efficiency by synchronizing estrus. , often combined with multiple ovulation via hormonal induction (MOET), enables elite females to produce 10-20 embryos per cycle, propagating superior genetics rapidly, particularly in and sheep. Cloning via , commercially viable since the 2000s for and pigs, replicates exact genotypes of high-value animals but is limited by high costs and low success rates below 10%. Selection programs incorporate estimated breeding values (EBVs) derived from genomic data and performance records to predict potential, reducing intervals in like where annual turns allow rapid progress in traits such as body weight gain. In sheep, selection for parasite resistance via fecal counts has improved resilience in extensive systems without compromising or yield. However, closed breeding populations risk , manifesting as 5-10% reductions in calf survival or litter size per 10% increase in coefficient, necessitating strategies like rotational crossing or genomic tracking to maintain heterozygosity. Effective balances these genetic gains against fitness costs, as evidenced by programs where annual rates of 0.5-1% are offset by to sustain .

Animal Health, Disease Prevention, and Veterinary Care

Animal health management in husbandry focuses on minimizing morbidity and mortality through preventive measures and timely interventions, as diseased animals reduce productivity and economic returns. Biosecurity protocols, including restricted farm access, disinfection of equipment, and quarantine of new livestock, effectively limit pathogen introduction and spread. For instance, controlling visitor and worker movements has been shown to reduce disease incidence risks in meta-analyses of farm studies. Vaccination programs target prevalent infectious diseases, enhancing and averting outbreaks. In , routine vaccinations against viral respiratory pathogens like and infectious bovine rhinotracheitis decrease clinical illness and improve weight gains. Efficacy data indicate that vaccines protect 96% of cattle from infection after one year, compared to 58% in unvaccinated groups. Common diseases addressed include in , African swine fever in pigs, and in , with prevention emphasizing clean water, parasite control, and precise scheduling. Veterinary care involves regular herd monitoring, diagnostic testing, and treatments such as and , though the latter's overuse contributes to (AMR). Global livestock use declined 13% from recent baselines due to efforts, yet projections suggest a 30% rise by 2040 without intensified management. In the U.S., FDA oversight links animal exposure to human-transmissible resistant , prompting judicious use focused on therapeutic needs over growth promotion. Integrated approaches, combining , , and veterinary oversight, sustain in intensive systems while mitigating zoonotic risks.

Diversity of Species in Husbandry

Animal husbandry involves the management of diverse domesticated for purposes including , , eggs, fiber, and labor, with primary focus on mammals and birds but extending to , , and . The and Agriculture Organization's Domestic Animal Diversity Information System records approximately 8,800 breeds across 38 livestock globally, encompassing mammals and birds that provide essential products and services while adapting to varied environmental conditions. This breed-level variation, representing about half of intra- genetic , enhances resilience against diseases and challenges through traits like heat tolerance in tropical breeds or wool quality in temperate ones. Mammalian species dominate traditional husbandry, with ruminants such as , sheep, goats, and forming the backbone in regions like and for milk, meat, and draft power. Pigs, concentrated in and , contribute significantly to global production, while equines and camelids serve niche roles in transport and arid-zone pastoralism. Poultry, particularly chickens, represent the most abundant class, with billions raised annually for eggs and , supplemented by turkeys, ducks, and geese in specialized systems. These species' distributions reflect historical patterns and agroecological suitability, with maintained through breed conservation to counter intensification-driven erosion. Aquaculture expands husbandry's scope to aquatic , exhibiting greater taxonomic diversity than terrestrial . In 2017, 332 were farmed worldwide, including 212 finfish (e.g., carps, tilapias, ), 65 mollusks (e.g., oysters, mussels), and 30 crustaceans (e.g., shrimps), though roughly 50 account for 90% of production volume. Top groups include cyprinids, penaeid shrimps, and bivalves, farmed in freshwater, brackish, and marine systems to meet rising demand. This diversification mitigates risks from but faces constraints from disease susceptibility in concentrated farming. Emerging branches include apiculture for bees (Apis mellifera and relatives), for silkworms (), and for edible species like crickets (Acheta domesticus), mealworms (Tenebrio molitor), and black soldier flies (), which convert organic waste into protein-efficient feed and food. These , now commercially scaled in controlled environments, address gaps in conventional by requiring less land and water, though production remains limited compared to vertebrates. Overall, in husbandry balances productivity with adaptive potential, informed by empirical management rather than uniform intensification.

Products and Economic Role

Primary Outputs and Their Uses

The primary outputs of animal husbandry encompass edible products such as , , and eggs, alongside non-edible materials including , hides and skins for production, and . , derived from species like , , , and sheep, serves predominantly as a protein-rich source, with global production of major meats (chicken, pig, and cattle) reaching 321 million tonnes in 2023. , obtained mainly from cows, goats, and sheep, provides nutrients including proteins, fats, and calcium for direct consumption or processing into cheese, , and , supporting dietary needs worldwide. Eggs, primarily from , offer high-quality protein and vitamins, functioning as a versatile staple in human diets. Non-food outputs include from sheep and other -producing animals, utilized for textiles and apparel due to its insulating and durable properties; global livestock production indices track wool as a key fiber commodity. Hides and skins, byproducts of , are processed into for , , , and industrial applications, with leather meal derived from tanned hides serving as a protein supplement in animal feeds. , generated across all systems, acts as an rich in , , and , enhancing and crop yields when applied to fields, thereby nutrients in agricultural cycles. These outputs collectively address human requirements for , materials, and soil amendment, with production scales reflecting demand driven by and .

Economic Contributions and Global Trade

The livestock sector, encompassing animal husbandry practices, accounts for approximately 40% of the global value of agricultural output, supporting the livelihoods of over 1.3 billion people worldwide, many in low- and middle-income countries where it provides essential income and . In , the total value of global agricultural production reached $3.8 trillion, implying a livestock contribution of roughly $1.5 trillion, driven by outputs such as , , eggs, and hides that underpin food systems and rural economies. This sector's economic multiplier effects extend to ancillary industries like feed production, processing, and transportation, amplifying its role in (GDP) formation, particularly in regions dependent on and smallholder farming. Global trade in products, including , , and live animals, forms a substantial portion of international agricultural commerce, with exports facilitating surplus production from efficient producers to deficit markets in and elsewhere. In 2023, U.S. exports of animal products alone exceeded $37 billion, representing about 20% of total U.S. agricultural exports and highlighting the sector's competitiveness in ($10.45 billion), , and ($8 billion in 2024). Major exporters include and for , the for and processed meats, and the for and , with trade volumes influenced by factors such as disease outbreaks, feed costs, and sanitary standards. Developing economies often participate through live animal exports or niche products, though barriers like tariffs and non-tariff measures, including those related to animal , constrain flows and favor vertically integrated supply chains in high-income countries.
Product CategoryTop Exporters (2023-2024 Data)Approximate Export Value (USD)
Beef, , U.S.: $10.45 billion
Pork, U.S. record volumes in 2024
Dairy, , U.S.: $8 billion in 2024
Projections indicate steady growth in trade volumes through 2034, tempered by rising input costs and geopolitical disruptions, underscoring animal husbandry's integral role in balancing global supply-demand dynamics.

Specialized Branches

Dairy Farming Practices

Dairy farming practices encompass the systematic management of primarily bovine herds to produce milk efficiently and safely, with global output reaching approximately 950 million metric tons in 2024, driven by a 1.1% annual growth rate. These practices prioritize animal health, hygiene, nutrition, and welfare to yield quality milk from healthy animals under sustainable conditions, as outlined in guidelines from organizations like the Food and Agriculture Organization (FAO). Key elements include breed selection favoring high-yield varieties such as Holstein-Friesian cows, which dominate modern operations for their capacity to produce over 10,000 liters per lactation in intensive systems. Housing systems vary by region and scale but commonly feature freestall barns in and , allowing cows freedom of with individual s for resting on like or mattresses to reduce lameness risks. Tie-stall systems, where cows are restrained in individual stalls, persist in smaller operations for easier monitoring and access, though they limit mobility compared to loose housing or pasture-based setups prevalent in parts of and . Ventilation, flooring, and space allocation—typically 1.1 to 1.5 square meters per cow in systems—are engineered to minimize stress and transmission, with empirical data showing freestall designs correlating with lower somatic cell counts indicative of udder health. Feeding strategies emphasize total mixed rations (TMR) combining forages like corn silage and with concentrates to meet energy demands peaking at 30-35 kg intake daily for high-producing cows, optimizing function and milk fat content. Precision feeding adjusts for lactation stage, using tools like feed pushers to enhance intake and reduce waste, which can account for 5-10% of costs; strategies include phasing concentrates post-calving to prevent metabolic disorders like . Grazing systems supplement TMR in temperate regions, providing 40-60% of diet from to lower input costs, though intensive confinement feeding prevails in arid or large-scale farms for consistent yields. Milking occurs twice or thrice daily using automated systems such as , herringbone parlors, or rotary platforms that handle 50-100 cows per hour, incorporating dips and forestripping to curb incidence rates below 5% in well-managed herds. Robotic milking systems, adopted on over 10% of U.S. dairies by 2024, enable voluntary cow entry and real-time monitoring of yield and health via sensors, reducing labor by 50% but necessitating training periods to achieve 90% participation rates. protocols, including pre- and post-milking , ensure milk bacterial loads under 100,000 CFU/ml, aligning with regulatory standards. Health management integrates , against diseases like , and routine monitoring for metabolic issues, with foot bathing weekly using solutions to prevent affecting up to 20% of herds untreated. Dry cow therapy and for disease resistance, coupled with data from herd management software, support rates of 25-30% annually to sustain , emphasizing causal links between , , and reduced clinical from 40 to 15 cases per 100 cows yearly in optimized systems.

Meat Production Systems

Meat production systems in animal husbandry primarily involve rearing , pigs, sheep, and goats for slaughter, categorized broadly as extensive (pasture- or grassland-based) or intensive (confinement or -based). Extensive systems rely on natural , suitable for ruminants in regions with ample , while intensive systems use controlled feeding to accelerate growth and maximize yields per animal. Globally, these systems produced an estimated 365 million metric tons of in 2024, with intensive methods accounting for about 40% of output due to superior feed conversion and throughput efficiencies. In beef production, extensive cow-calf operations predominate in systems, where breeding herds graze pastures to produce calves weaned at 6-8 months and 200-300 kg live . These calves often enter intensive for finishing on high-energy diets, achieving average daily gains of 1.5-2 kg and reaching slaughter (500-600 kg) in 120-180 days, compared to 0.5-1 kg gains and extended timelines (up to 24 months) in fully grass-fed systems. finishing enhances marbling and carcass yield, with feed efficiencies of 6-7 kg per kg gain, enabling scalability in land-scarce regions; approximately 1 billion worldwide operate across such hybrid models. Pork production largely employs intensive confinement systems, where pigs are housed in climate-controlled barns from to slaughter, optimizing space and feed to yield 100-120 kg market weights in 5-6 months. These setups facilitate year-round farrowing, with sows producing 20-30 piglets annually per , and overall feed conversion ratios of 2.5-3 kg feed per kg live weight gain, minimizing exposure to weather and predators while enabling high-density operations. Extensive or free-range systems, allowing outdoor access, support natural behaviors but incur lower due to slower growth and higher risks, comprising a minor share of global output dominated by confinement for . Sheep and goat meat production favors extensive systems in arid or pastoral regions, with flocks grazing native vegetation to produce lambs or kids at 20-40 kg in 4-12 months, yielding lower densities but leveraging low-input resilience. Intensive feedlot finishing for lambs, using grain supplementation, boosts gains to 0.3-0.4 kg daily and improves meat quality, though extensive grazing remains prevalent for over 1 billion small ruminants globally, particularly in developing economies. Hybrid approaches, combining grazing with supplemental feeding, balance yield and land use across diverse agroecological zones.

Poultry Husbandry


Poultry husbandry focuses on the rearing of domesticated birds, chiefly chickens (Gallus gallus domesticus), but also turkeys, ducks, and geese, for meat, eggs, and secondary products like feathers. Chickens constitute over 90% of global poultry output due to their efficient feed conversion and rapid reproduction cycles. In 2023, worldwide poultry meat production totaled 142 million metric tons, representing 40% of all meat produced, while egg output has risen 150% over the prior three decades amid rising demand for affordable protein. Breeds are selectively developed for specific purposes: broiler strains such as Cobb or Hubbard achieve slaughter weight of 2-3 kg in 5-7 weeks through genetic selection for fast growth and high muscle yield, yielding feed conversion ratios around 1.5-2 kg feed per kg gain. Layer breeds like White Leghorn or prioritize egg production, with commercial hens laying 280-320 eggs annually under optimal conditions, though productivity declines after 18-24 months. Dual-purpose heritage breeds exist for small-scale operations but yield lower efficiencies in intensive systems. Housing systems range from intensive confinement to extensive pastured setups. Battery cage systems for layers confine 4-10 birds per unit in tiered wire enclosures, maximizing density at 300-500 birds per square meter while facilitating removal, feed distribution, and reducing aggression through spatial control; this setup lowers mortality from and predation compared to systems. Broilers typically use deep-litter housing in climate-controlled barns, stocked at 30-40 kg per square meter to promote uniform growth. Free-range or pasture-based systems grant outdoor access for , potentially enhancing and , but elevate risks of parasitic infections and breaches, with production densities limited to 10-20 birds per square meter indoors plus outdoor acreage. Feeding regimens emphasize balanced corn-soy diets supplemented with vitamins, minerals, and ; broilers consume 3-4 kg feed lifetime, while layers require calcium-enriched rations for shell formation. Water access is critical, with automated nipple systems ensuring 200-300 ml daily intake per bird. Health protocols center on against viral threats like Newcastle disease virus (NDV), infectious bursal disease (IBDV), and infectious bronchitis virus (IBV), administered via drinking water, spray, or in ovo methods at hatcheries to induce flock immunity before exposure. includes all-in-all-out cycles, footbaths, and restricted visitor access to curb bacterial pathogens like Salmonella and E. coli. Antibiotic use has declined with improved and , focusing on prevention over treatment.

Aquaculture and Fish Farming

Aquaculture encompasses the controlled rearing of finfish, , crustaceans, and aquatic plants in freshwater, brackish, or marine environments for , restoration, or other purposes, distinguishing it from extractive wild capture fisheries. In 2022, global aquaculture production contributed to a combined fisheries and aquaculture total of 223.2 million tonnes, marking a 4.4 percent rise from 2020 levels and supplying over 50 percent of for human consumption. dominates output, with alone accounting for a substantial share, driven by inland systems producing species like carps and . Historical records indicate aquaculture originated in ancient around 2500–3500 BCE with common carp farming in ponds integrated with rice paddies, followed by advancements in and by the first millennium BCE. Expansion accelerated post-World War II, particularly from the 1970s, as wild stocks stagnated, leading to domesticated strains for over 97 percent of cultured by 2007. Modern practices emphasize for growth rates and disease resistance, with global inland aquaculture reaching 54.4 million tonnes in 2020, representing 44.4 percent of total animal aquaculture production. Key production methods include pond culture for freshwater species, net-pen cages in coastal or offshore waters for marine finfish like , and recirculating aquaculture systems (RAS) that minimize water exchange through filtration and biofiltration. Major farmed species comprise carps (e.g., grass and ), tilapia, catfish, salmonids, shrimp (e.g., Pacific ), and bivalves like mussels and oysters, which together form the bulk of output due to their adaptability and market demand. Challenges include disease outbreaks, such as sea lice in farms, prompting use that risks resistance and transfer to wild populations, though empirical data show localized impacts often recover post-farming via natural dilution. escapes from net pens can introduce farmed into wild stocks, potentially reducing fitness through hybridization, with reporting millions of escapes annually but variable ecological effects based on proximity and . Feed sustainability poses issues for carnivorous reliant on meal, though alternatives like plant-based or proteins are emerging; discharges cause benthic enrichment near farms, detectable up to 130 meters but mitigated by site rotation and (IMTA) combining fed with extractive and . Innovations such as offshore cages and RAS enhance containment and reduce effluent, supporting scalable production with lower wild dependency.

Apiculture, Sericulture, and Other Minor Branches

Apiculture, or , entails the and management of colonies, predominantly Apis mellifera, to produce , , , , and , while also providing services essential for crop yields. Beekeepers maintain hives through practices such as swarm control, queen rearing, and disease mitigation via treatments like for Varroa mites, with colony overwintering losses influencing annual productivity. In the United States, managed colonies numbered approximately 2.60 million as of October 2024, though national surveys reported 55.6% colony losses between April 2024 and April 2025, attributed to factors including pesticides, pathogens, and nutritional deficits. Globally, the apiculture sector generated USD 11.75 billion in revenue in 2024, driven by rising demand for natural sweeteners and hive products amid health trends favoring unprocessed alternatives to refined sugars. Sericulture encompasses the cultivation of mulberry silkworms () through controlled rearing on mulberry leaves, followed by cocoon harvesting for filament extraction via boiling and reeling. This labor-intensive process yields raw , with global production dominated by , which accounts for the majority of output, followed by , where the industry supports 7.9 million jobs. In 2024, the international market reached USD 20.0 billion, reflecting steady demand for luxury textiles and medical applications like sutures, though production faces challenges from competition and climate variability affecting mulberry yields. Annual silkworm litter generation exceeds 16 million tons, often repurposed for organic fertilizers or absorbents to enhance . Innovations in bivoltine hybrid strains have boosted cocoon yields to 40-50 kg per 1/100 acre in optimal conditions, underscoring sericulture's role in rural economies despite its scale relative to livestock sectors. Other minor branches of animal husbandry include lac culture, involving the farming of lac (Kerria lacca) on host trees like palas or kusum to produce lac resin for , a natural used in varnishes, polishes, and glazes. leads global lac production at around 15,000-20,000 tons annually, with exports valued at USD 10-15 million, though output fluctuates due to pest pressures and monsoon dependence. These invertebrate-focused practices, while economically niche—contributing less than 1% to overall animal husbandry output—offer diversified income streams in tropical regions, often integrated with to minimize land competition with staple crops. Empirical assessments indicate higher resilience to feed scarcity compared to large herbivores, but scalability remains limited by biological constraints like univoltine cycles and host specificity.

Insect Farming and Novel Proteins

Insect farming entails the controlled rearing of for the production of proteins used in and , positioning it as an emerging branch of animal husbandry focused on and . Common species include (Acheta domesticus), mealworms ( molitor), and black soldier fly larvae (), selected for their rapid growth, high nutritional density, and ability to thrive on organic waste substrates. These exhibit superior feed conversion ratios compared to traditional , requiring approximately 2 kg of feed per kg of mass gain for versus 4-10 kg for or . Production methods involve modular, climate-controlled facilities where are bred in stacked trays or bioreactors, fed agricultural byproducts or food waste to minimize resource inputs. demand 50-90% less and up to 75% less than conventional for equivalent protein output, with black soldier flies converting waste into biomass at efficiencies exceeding those of fishmeal production. from insect rearing average 5-11 kg CO₂-equivalent per kg of protein, substantially lower than beef's 35 kg but comparable to efficient systems, underscoring advantages primarily against high-impact meats rather than all animal proteins. As novel proteins, insect-derived products offer 50-70% protein content by dry weight, rich in essential , alongside fats, vitamins, and minerals, making them viable for fortifying feeds in and or direct consumption in flours and bars. The UN highlights insects' role in , noting their potential to utilize low-value feedstocks while providing complete , though biological hazards like pathogens necessitate rigorous processing such as or to ensure safety. Regulatory approvals have advanced, with the authorizing UV-treated Tenebrio molitor powder as a in January 2025, and similar pathways opening for feed uses in the and . The global insect protein market reached approximately USD 309 million in 2025, projected to grow at a 4.9% CAGR through 2030, driven by in amid pressures to reduce soy and fishmeal reliance. Challenges persist in scaling industrial operations, where energy for climate control can offset some environmental gains, and consumer aversion in Western markets limits direct food adoption despite nutritional equivalence to soy or . Empirical assessments indicate that while reduces certain externalities like , its systemic impact depends on waste-sourced feeds and localized production to avoid transport emissions.

Impacts and Externalities

Environmental Effects: Empirical Data and Causal Factors

Animal husbandry contributes approximately 14.5% of global anthropogenic greenhouse gas emissions, primarily through methane (CH4) from enteric fermentation in ruminants and nitrous oxide (N2O) from manure management, according to Food and Agriculture Organization (FAO) estimates that include the full livestock supply chain. Enteric fermentation occurs in the rumen of cattle, sheep, and other ruminants, where methanogenic archaea convert hydrogen and carbon dioxide produced during microbial digestion of fibrous feeds into methane, a gas with a global warming potential 28-34 times that of CO2 over 100 years. Manure management systems, particularly anaerobic storage like lagoons, generate additional CH4 through microbial decomposition under oxygen-limited conditions and N2O from nitrification and denitrification processes involving nitrogen-rich waste. Empirical data from 2022 indicate that global , including , emitted 16.2 billion tonnes of CO2 equivalent, with livestock enteric CH4 accounting for 20-26% of agricultural GHG. However, methodological critiques argue that attributing all land-use change emissions to overstates direct causality, as much arises from historical expansion rather than ongoing production efficiency improvements. , especially bovines, dominate these emissions, comprising about 75% of sector CO2-equivalent output due to their digestive and scale of production. Livestock systems occupy roughly 77% of global agricultural land, including pastures and feed crop areas, driving deforestation primarily for pasture expansion, as seen in the Brazilian Amazon where cattle ranching accounts for 80% of forest clearing. This land conversion reduces biodiversity by fragmenting habitats and replacing diverse ecosystems with monoculture grasslands, with over 90% of land-use change biodiversity impacts linked to agriculture, 21% specifically to pastures. Causal factors include economic incentives for low-cost extensive grazing, which favors clearing carbon-rich forests over maintaining existing pastures, exacerbating habitat loss for species dependent on native vegetation. Water use in animal husbandry is intensive, with and comprising 30-40% of agriculture's total demand, largely for irrigated feed crops like soy and , while pollution from manure runoff introduces nitrates, phosphates, and , leading to and hypoxic zones in waterways. In concentrated operations, such as feedlots, nutrient loading from animal residuals can exceed assimilation capacities, causing algal blooms and declines in receiving waters, with empirical studies linking proximity to animal feeding operations to elevated contaminant levels in and . Grazing intensity further influences , where high-density stocking removes biomass and compacts soil, inhibiting plant regeneration and favoring over native .

Animal Welfare: Biological Realities and Management

Animal welfare in husbandry is grounded in the biological capacity of to maintain health, growth, and normal physiological functioning while minimizing negative affective states such as , , and . Scientifically, it encompasses freedom from , , , and environmental discomfort, alongside opportunities for species-typical behaviors that support and , rather than anthropocentric ideals of "naturalness." Empirical assessments prioritize measurable outcomes like immune function, , and over subjective perceptions, as biological functioning correlates with evolutionary fitness and productivity metrics such as yield or in managed herds. Key indicators of welfare derive from animal-based observations, including body condition scores, lameness prevalence, and injury rates, which reflect nutritional adequacy and mobility. Physiological markers, such as fecal metabolites, gauge acute stress responses, though elevated levels alone do not indicate poor welfare, as cortisol facilitates adaptive responses to challenges like or transport and varies diurnally. Behavioral signs, including reduced stereotypies (e.g., tail-biting in pigs) and increased affiliative interactions, provide evidence of positive states when paired with ; for instance, cows exhibiting low hock lesions and high rumination time demonstrate effective environmental management. Vocalizations serve as real-time indicators, with excessive distress calls signaling unmet needs in group-housed or swine. Biological realities dictate species-specific requirements: ruminants like thrive on high-fiber diets to support rumen , preventing , while monogastrics such as pigs require manipulable substrates to fulfill instincts without necessitating extensive land. In extensive systems, animals face risks from predation, parasites, and climatic extremes, potentially elevating baseline ; studies on analogs show free-ranging individuals with higher levels than captives under controlled conditions, due to unpredictable and threats. Intensive confinement, when density-matched to thermal and social needs, can yield lower disease incidence through and —e.g., reduced in feedlots versus exposure—though mismanagement risks heat stress or if space falls below ethological thresholds (e.g., 1.1 m² per sow in crates per EU standards, adjusted for body weight). Effective management integrates causal interventions: environmental enrichment (e.g., straw bedding for pigs reducing aggression by 30-50% in trials) and precision technologies like automated feeders ensure consistent , mitigating hunger-related stereotypies. Selective breeding for docility and resilience—e.g., low-reactivity genotypes in sheep—lowers , as for response is 0.2-0.4 across breeds. Health protocols, including routine and foot trimming, address lameness, a primary welfare impairer in herds affecting 25-50% annually without intervention. Peer-reviewed data emphasize that welfare improves via evidence-based adjustments, not blanket transitions to extensive models, which often amplify mortality from exposure (e.g., 10-20% lamb losses to predators in open ranges). Positive welfare extends beyond to fostering rewarding experiences, such as social bonding in animals or dust-bathing in , which enhance neural reward pathways and immune competence. Frameworks like the Five Domains model—, environment, , , —offer a holistic lens, prioritizing causal links (e.g., poor ventilation causing respiratory acidosis) over the absolute "freedoms," which critiques note are unattainable in variable wild conditions. In practice, farms achieving low counts (<200,000/mL in milk) and high conception rates (>50%) exemplify biologically attuned husbandry, correlating with reduced negative affects per longitudinal studies. Ongoing research validates these via integrated sensors for real-time and activity tracking, enabling proactive management over ideological reforms.

Human Health Benefits from Animal Products

Animal products derived from husbandry practices, such as , , eggs, and , supply complete proteins comprising all nine essential in proportions closely matching human requirements, with digestibility scores often exceeding 90% as measured by the (DIAAS). This contrasts with plant proteins, which frequently require combination for completeness and exhibit lower due to antinutritional factors like phytates and fiber that impair absorption. Consumption of these proteins supports muscle protein synthesis, , and metabolic health, particularly in populations at risk of or undernutrition, where animal-sourced proteins have demonstrated efficacy in preserving lean mass during caloric restriction. Micronutrients in animal products often surpass plant counterparts in bioavailability and exclusivity; for instance, vitamin B12, critical for red blood cell formation and neurological function, occurs naturally only in animal tissues, with deficiency rates approaching 40-80% in unsupplemented vegans leading to anemia and cognitive impairment. Heme iron from red meat exhibits 15-35% absorption efficiency versus 2-20% for non-heme plant iron, reducing anemia prevalence in meat-inclusive diets, as evidenced by cohort studies in diverse populations. Similarly, preformed docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) omega-3 fatty acids from fatty fish support cardiovascular and brain health, with meta-analyses linking 250 mg daily intake to 13% lower coronary heart disease risk. Dairy calcium and vitamin D3 further bolster bone mineral density, with longitudinal data showing reduced fracture risk in consumers versus those reliant on plant sources. Empirical evidence from nutritional epidemiology underscores these benefits in preventing diet-related deficiencies; in low-income settings, incorporating animal products via husbandry has lowered stunting rates by up to 20% through enhanced growth factor provision, as tracked in randomized interventions. High-protein diets featuring animal sources correlate with improved glycemic control and weight management in type 2 diabetes trials, attributed to leucine's role in insulin signaling. While observational studies occasionally link excessive processed meat intake to adverse outcomes, unprocessed animal products contribute essential nutrients hard to replicate synthetically, supporting overall longevity in balanced intakes below 100g daily.

Socio-Economic and Cultural Impacts

Animal husbandry significantly bolsters global economies, contributing roughly 40 percent to agricultural (GDP) worldwide, with shares ranging from 15 to 80 percent in developing countries as of 2022. The sector's market value for farmed animals was estimated between 1.61 and 3.3 trillion USD in 2018, underscoring its role in trade, processing, and related industries. In developing nations, where accounts for about 30 percent of agricultural GDP, it drives rural and , with smallholder farmers relying on animals for cash sales, draft power, and nutrient recycling to sustain crop production. Livestock systems support by providing resilient assets that buffer against crop failures or market shocks, particularly in and , where they enable diversified livelihoods for over 500 million rural households. However, economic vulnerabilities persist, including price volatility and outbreaks, which can impose losses of 10 to 6,340 USD per depending on the system and affected. Intensification has shifted production toward developing countries, which held 53 percent of global output and 39 percent of production by 1997–1999, amplifying export revenues but also exposing producers to fluctuations. Culturally, animal husbandry has been foundational to human since the Neolithic era around 10,000 BCE, facilitating , surplus production, and through ownership of herds as status symbols. In pastoral societies of the , , and , underpin nomadic traditions, ties, and rituals such as bridewealth payments or communal feasts. Religious practices worldwide integrate animals: Hindu veneration of cows in prohibits slaughter and ties to agricultural cycles, while Islamic and Jewish dietary laws emphasize or kosher slaughter, shaping consumption patterns across billions. In pre-industrial , feudal economies revolved around for plowing and , embedding herding in and as emblems of prosperity. These practices persist amid , with retaining roles in festivals—like sacrifices in Muslim communities or indigenous rites in the —reinforcing identity and nutritional traditions. Yet, cultural attitudes vary; while Western intensification prioritizes efficiency, traditional systems in and emphasize multifunctional benefits, including for and hides for crafts, highlighting husbandry's enduring adaptation to local ecologies and values. Empirical data affirm that such integration enhances household resilience, countering narratives that overlook 's causal role in sustaining social structures beyond mere commodity production.

Controversies and Critical Perspectives

Debates on Intensive vs. Extensive Systems

Debates on intensive versus extensive animal husbandry systems center on trade-offs in , , environmental impacts, and economic viability. Intensive systems, characterized by high stocking densities, controlled environments, and supplemental feeds, enable higher output per unit of and labor, supporting global food demands with reduced conversion. Extensive systems, relying on and natural over larger areas, are often promoted for perceived naturalness but require significantly more per unit of production, potentially exacerbating habitat loss if scaled to meet needs. Empirical analyses indicate that intensive production yields more animal products per environmental input, challenging narratives that equate extensivity with . On , proponents of extensive systems argue they allow behavioral expression, such as and social interactions, reducing stress from confinement. However, studies reveal persistent welfare challenges in extensive setups, including nutritional deficiencies during forage shortages, exposure to , predation risks, and higher parasite loads due to outdoor access. In contrast, intensive systems provide consistent nutrition, veterinary interventions, and protection from predators, often resulting in lower mortality rates; for instance, chickens in controlled indoor environments exhibit fewer issues from environmental stressors compared to free-range counterparts. Free-range systems can increase zoonotic transmission risks, as evidenced by higher exposure in outdoor settings, underscoring that welfare outcomes depend on rather than system type alone. Advocacy groups frequently overlook these data, prioritizing ideological preferences over biological metrics like injury rates or . Environmentally, intensive systems demonstrate greater efficiency, producing more protein with fewer emissions per kilogram than extensive , which demands vast rangelands and can lead to degradation through . A of systems found intensive operations with lower intensities due to optimized feed conversion, while extensive often emits more per unit output from inefficient fermentation on poor-quality . Critics of intensification cite localized , yet global assessments show it spares forests by concentrating production, avoiding the tied to expanding pastures; for example, livestock intensification has correlated with reduced Amazon clearing rates since the 2000s. Extensive systems' claims are contested, as erodes soils, releasing stored carbon and yielding net emissions in many cases. Economically, enhances by lowering costs— farms in intensive models outperform extensive ones in profitability despite higher inputs, per European data—enabling affordable nutrition for billions. Extensive systems, while culturally valued in regions like , struggle with scalability amid climate variability, imposing higher prices that limit access in developing economies. These debates reflect tensions between evidence-based efficiency and romanticized traditionalism, with mainstream critiques often amplified by biased advocacy despite peer-reviewed counter-evidence favoring intensification for causal outcomes like reduced and habitat preservation.

Environmental Impact Claims: Verification and Critiques

Common claims assert that production accounts for 14.5% of global anthropogenic (GHG) emissions, a figure originating from the Food and Agriculture Organization's (FAO) 2006 report "Livestock's Long Shadow" and reiterated in subsequent assessments. This estimate encompasses (primarily from ruminants), manure management, feed production, and land-use changes, totaling about 7.1 gigatons of CO2-equivalent annually. Verification through peer-reviewed analyses confirms that from constitutes around 32% of human-caused , with global systems emitting approximately 120 million tons of yearly, but this biogenic source differs from in its shorter atmospheric lifespan (about 12 years versus centuries for CO2) and potential for carbon-neutral cycling via regeneration. Critiques highlight methodological flaws in the 14.5% attribution, including failure to net out sequestration from lands and over-attribution of emissions to versus co-products like soy feed, which serves both animal and human plant-based diets. For instance, regenerative practices—such as rotational or holistic —have demonstrated organic carbon increases of 0.1 to 1.0 tons per annually in peer-reviewed field trials, potentially offsetting 20-50% of emissions in pasture-based systems, though remains debated due to variability in types and climates. A 2021 of a regenerative found net GHG emissions near zero after accounting for sequestration, challenging blanket condemnations of husbandry, though critics note such benefits require precise and may not apply to confined feedlots. Water usage claims often cite livestock's "water footprint" at 4,387 cubic kilometers annually, predominantly for feed crops, positioning it as a major driver of . Empirical data verifies that over 94% of this is green (rainfall on pastures and crops), not blue from or rivers, which constitutes less than 6% globally and is more relevant to scarcity concerns. Critiques emphasize that grass-fed systems rely almost entirely on green , mimicking natural herbivore ecosystems, and that virtual calculations overlook regional efficiencies; for example, beef in arid uses less diverted per kilogram than almonds or rice in water-stressed . Moreover, integrated crop-livestock systems recycle via , reducing net demand by up to 30% compared to monocrop alternatives. Deforestation attributions frequently blame for 80% of Amazon clearing, linking it to pasture expansion. Verification shows ranching indeed drives much tropical , with 45.1 million hectares converted globally for pasture by 2020, but accurate reveals indirect factors: soy for livestock feed accounts for only 20% of soy's deforestation footprint, as most soy serves direct human consumption in and . Critiques argue over-attribution ignores that 70-80% of deforested land in regions like the stems from speculative land grabs or preceding legal ranching, and extensive grazing on already-cleared marginal lands prevents further degradation via fire suppression and . Peer-reviewed modeling indicates that sustainable intensification—boosting on existing pastures—could spare 1-2 billion hectares from conversion by 2050, countering narratives that equate all animal husbandry with habitat loss. Nutrient pollution from manure is another contested claim, with livestock blamed for 30-50% of agricultural eutrophication in waterways. Empirical studies confirm excess and from intensive operations contribute to algal blooms, as seen in U.S. watersheds where farms elevate levels by 20-40 mg/L. However, critiques point to via precision feeding and cover cropping, which reduce runoff by 40-60% in managed systems, and note that plant-based fertilizers (e.g., synthetic ) cause comparable or higher leaching per unit due to inefficiencies in crop uptake. Overall, while intensive confinement amplifies localized impacts, diverse husbandry systems—particularly regenerative and silvopastoral—enhance and ecosystem services, with meta-analyses showing grazed lands supporting 20-30% higher diversity than tilled croplands. These findings underscore that environmental critiques often generalize from worst-case industrial models, neglecting evidence-based practices that align animal production with .

Animal Rights Advocacy vs. Evidence-Based Welfare

Animal rights advocacy posits that non-human animals possess inherent moral or legal comparable to those of humans, thereby rejecting their or use in practices such as farming, as argued by deontologists like who emphasize animals' status as "subjects-of-a-life" deserving protection from exploitation. This perspective, rooted in opposition to , seeks the abolition of animal agriculture rather than its reform, with proponents claiming that any human benefit derived from animals justifies undue . In opposition, evidence-based animal welfare evaluates conditions through measurable indicators of physical and , such as freedom from hunger and thirst, discomfort, pain or disease, to express normal behaviors, and fear or distress—principles formalized in the Five Freedoms framework developed in the and refined through subsequent scientific validation. Empirical assessments of systems reveal that managed husbandry often outperforms wild existence in key welfare metrics; for example, domesticated mammals under human care exhibit extended longevity compared to wild populations, with studies showing 84% of living longer due to from predation, , and injury—dynamics paralleled in farming where veterinary interventions and control reduce mortality rates far below those in . Rights advocates frequently highlight intensive systems' spatial constraints as inherently cruel, yet peer-reviewed analyses indicate these can achieve superior welfare outcomes, including lower disease incidence and higher body condition scores, relative to extensive where exposure to parasites, extremes, and predators elevates stress and mortality. Critiques of underscore its divergence from causal , noting that ideological demands for zero-use ignore on welfare enhancements like environmental enrichments reducing stereotypic behaviors in confined by up to 50% in controlled trials, or how larger-scale operations correlate with better overall indices through economies enabling advanced monitoring and health protocols. While has driven regulatory reforms, such as directives on space allowances, its absolutism risks overlooking first-principles realities: has evolutionarily selected for traits favoring human-managed thriving, with farmed animals' average lifespans exceeding wild equivalents by factors of 5-10 for like chickens and pigs absent slaughter. Sources advancing claims, often from activist organizations, warrant scrutiny for selective emphasis on anecdotes over longitudinal , contrasting with welfare science's reliance on quantifiable outcomes like lameness prevalence or levels.

Recent Advances and Future Outlook

Technological Innovations in Precision Husbandry

Precision livestock farming (PLF), also known as precision animal husbandry, integrates sensors, data analytics, and to enable real-time monitoring and management of individual animals rather than herds as a whole. This approach emerged in the early 2000s but has accelerated with advancements in (IoT) devices and (AI), allowing farmers to detect subtle changes in animal health, behavior, and productivity. For instance, PLF systems collect continuous data on metrics like activity levels, rumination, and body temperature, facilitating early intervention for issues such as lameness or . Wearable sensors and boluses represent core innovations, with rumen boluses deployed in since the 2010s to track internal via , , and movement . GPS-enabled collars, commercially available for virtual in beef production for over two decades, now incorporate AI to dynamically adjust boundaries, reducing labor and by up to 30% in trials. In and operations, ear tags and accelerometers monitor feeding efficiency and detect heat stress, with empirical studies showing a 10-15% improvement in growth rates through optimized environmental controls. Computer vision and AI-driven imaging systems have advanced welfare assessment, using cameras to analyze , posture, and social interactions for automated . A 2023 review highlighted models achieving over 90% accuracy in identifying via facial recognition and thermal imaging, reducing antibiotic use by enabling targeted treatments. Robotic systems, such as automated milking parlors equipped with AI for udder health scoring, have proliferated in dairy farms, with adoption linked to a 5-10% increase in milk yield per cow in Italian studies from 2020. Data integration platforms employing aggregate sensor inputs for , forecasting calving events or outbreaks with precision exceeding traditional methods. In a 2020 analysis of Italian dairy herds, PLF implementation correlated with a 12% rise in productivity, attributed to reduced metabolic disorders through data-informed feeding adjustments. These technologies also yield environmental gains, with models indicating 11-138% reductions in eco-toxicity from optimized resource use, though scalability remains constrained by high initial costs and data privacy concerns in multi-farm deployments.

Genetic and Breeding Advancements

Genomic selection has transformed breeding by enabling the prediction of breeding values using high-density (SNP) arrays, allowing selection of superior animals at a young age without extensive progeny testing. This approach has accelerated genetic gain in , where implementation since the mid-2000s has increased rates of improvement for traits like milk yield by up to 50% compared to traditional methods, primarily through reduced generation intervals from two to . In , genomic selection targets disease resistance and feed efficiency, with tools identifying markers for traits like tolerance, enhancing overall herd productivity. Similar applications in pigs and have improved growth rates and meat quality, though challenges persist in crossbred populations where marker effects vary. Marker-assisted selection (MAS), an earlier genomic tool, uses specific DNA markers linked to quantitative trait loci (QTL) for targeted trait improvement, predating widespread GS but now integrated into it. In poultry breeding, MAS has facilitated selection for disease resistance, such as , by identifying markers for genes, contributing to annual genetic gains of 1-2% in egg production and body weight. For pigs, MAS addressed traits like the gene for pork quality in the 1990s, evolving into GS that now predicts crossbred performance with accuracies exceeding 0.7 for growth and carcass traits. These methods rely on empirical validation through phenotypic data, ensuring predictions align with real-world outcomes rather than assumptions of genetic neutrality. CRISPR/Cas9 gene editing represents a leap beyond selection, permitting precise modifications to introduce or eliminate alleles for complex traits. In 2020, the U.S. FDA approved gene-edited pigs lacking porcine endogenous retroviruses (PERVs), reducing xenotransplantation risks, with cloned pigs produced successfully thereafter. By 2023, CRISPR-edited cattle with a natural hornless allele (via Polish Holstein edits) entered commercial herds, avoiding dehorning procedures while maintaining milk production equivalent to non-edited peers. In pigs, edits for PRRS virus resistance via CD163 gene knockout have shown 100% protection in challenge studies, potentially cutting industry losses exceeding $600 million annually in the U.S. alone. Applications extend to methane reduction, with rumen methanogen edits decreasing emissions by up to 30% in vitro, addressing causal links between livestock digestion and greenhouse gases without relying on unverified mitigation models. Poultry edits for avian flu resistance are in trials, though regulatory hurdles limit field deployment. From 2020 to 2025, technologies like transcriptomics and have complemented GS and , enabling multi-trait optimization for , such as heat tolerance in tropical breeds via identified QTL for . These advancements have driven market growth in animal products to $5.2 billion by 2025, reflecting empirical gains in efficiency amid demands for . However, varies by and region, with leading due to established SNP infrastructure, while sheep and lag owing to fragmented populations and lower-density . Future integration of AI-driven genomic predictions promises further precision, contingent on large-scale, unbiased datasets to counter potential overestimation from small cohorts.

Sustainability and Adaptation Strategies

Improving feed efficiency in production represents a core strategy, as optimizing utilization and reducing can substantially lower resource demands and emissions. For example, enhancing feed conversion ratios through balanced diets and precision feeding has been shown to decrease the environmental footprint per unit of by up to 20-30% in intensive systems, according to analyses of global data. Similarly, better management, including anaerobic digesters for capture, recycles nutrients and cuts releases, with empirical studies indicating reductions of 50-80% in targeted operations. Animal interventions further bolster sustainability by minimizing production losses that inflate emissions intensity. Reducing incidence in herds, measured by lowering counts from 800,000 to 50,000 cells per milliliter, yields a 3.7% drop in per liter of , based on lifecycle assessments integrating and metrics. Overall, accounts for about 12% of anthropogenic , a figure revised downward from earlier FAO estimates of 14.5% upon refined of non- factors like changes. Transitioning inefficient smallholder systems to higher models—via improved and veterinary care—can halve emissions per kilogram of output, as demonstrated in comparative studies across developing regions. Adaptation strategies address climate variability by enhancing system resilience, including for traits like heat tolerance and drought-resistant crops in integrated crop-livestock setups. In subtropical zones, shifting to small ruminants such as and sheep, which require less water and feed, has proven effective, with data from trials showing sustained productivity amid rising temperatures. Water-efficient practices, like and , mitigate impacts; for instance, controlled grazing in arid areas preserves soil moisture and , reducing by 40-60% per field experiments. Disease vector control through and management further adapts herds to shifting ranges, preventing losses estimated at 20-30% in unmitigated scenarios. These approaches prioritize empirical outcomes over unsubstantiated mitigation narratives, with integrated systems—combining livestock with —demonstrating net potential in soils, countering claims of inherent unsustainability in animal agriculture. Ongoing advancements, such as genomic selection for resilient breeds since the early , enable targeted adaptations without compromising yields, as validated in long-term breeding programs.

References

  1. https://www.sciencedirect.com/topics/nursing-and-health-professions/animal-husbandry
  2. https://extension.missouri.edu/media/wysiwyg/Extensiondata/CountyPages/Adair/Docs/HistoryoftheAnimalScienceIndustry.pdf
  3. https://www.sciencedirect.com/science/article/pii/S1631069110002982
  4. https://directives.nrcs.usda.gov/sites/default/files2/1712930386/33922.pdf
  5. https://www.aphis.usda.gov/animal-welfare/downloads/AC_BlueBook_AWA_508_comp_version.pdf
  6. https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2022.1085219/full
  7. https://www.researchgate.net/publication/393799965_Introduction_to_Animal_Husbandry_Scope_and_Importance
  8. https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/animal-husbandry
  9. https://getcourse.com.au/blog/role-of-animal-husbandry-modern-agriculture
  10. https://pmc.ncbi.nlm.nih.gov/articles/PMC11171394/
  11. https://pmc.ncbi.nlm.nih.gov/articles/PMC2935116/
  12. https://livestockdata.org/research-themes/economy
  13. https://www.ers.usda.gov/topics/animal-products/cattle-beef/sector-at-a-glance
  14. https://www.etymonline.com/word/husbandry
  15. https://grammarphobia.com/blog/2009/09/is-there-a-husband-in-husbandry.html
  16. https://www.oed.com/dictionary/husbandry_n
  17. https://www.merriam-webster.com/dictionary/husbandry
  18. https://bigtex.com/livestock-terminology/
  19. https://agriculture.institute/livestock-pasture-management/key-terminologies-animal-husbandry/
  20. https://cals.cornell.edu/nys-4-h-animal-science-programs/livestock/beef/beef-cattle-terms
  21. https://livestockconservancy.org/resources/animal-terms/
  22. https://www.nationalgeographic.com/culture/article/neolithic-agricultural-revolution
  23. https://www.smithsonianmag.com/science-nature/old-mchominids-farm-117453476/
  24. https://historyworld.net/history/Domesticationofanimals/240
  25. https://www.pnas.org/doi/10.1073/pnas.0901586106
  26. https://www.frontiersin.org/journals/ecology-and-evolution/articles/10.3389/fevo.2020.00103/full
  27. https://www.nature.com/articles/s41598-020-77002-4
  28. https://pmc.ncbi.nlm.nih.gov/articles/PMC8214435/
  29. https://cdli.earth/cdli-tablet/569
  30. https://www.sciencedirect.com/science/article/abs/pii/S0921448803002682
  31. https://fount.aucegypt.edu/etds/438/
  32. https://ecronicon.net/assets/ecve/pdf/ECVE-07-00487.pdf
  33. https://www.sciencedirect.com/science/article/pii/S2950236524000203
  34. https://www.sciencedirect.com/science/article/abs/pii/S2352409X18300695
  35. https://www.penn.museum/sites/expedition/cattle-and-the-harappan-chiefdoms-of-the-indus-valley/
  36. https://direct.mit.edu/jinh/article/46/1/1/48957/Human-Bovine-Plagues-in-the-Early-Middle-Ages
  37. https://www.journals.uchicago.edu/doi/pdf/10.1086/658052
  38. https://read.dukeupress.edu/agricultural-history/article/87/4/429/296956/Running-Amuck-Urban-Swine-Management-in-Late
  39. https://ir.library.louisville.edu/cgi/viewcontent.cgi?article=1882&context=faculty
  40. https://scholarworks.iu.edu/journals/index.php/tmr/article/view/20071
  41. https://www.nottingham.ac.uk/manuscriptsandspecialcollections/learning/laxton/theme2/grazing.aspx
  42. http://dasnr39.dasnr.okstate.edu/farm2fork/tindofag1.php
  43. https://link.springer.com/article/10.1007/s12520-018-0723-6
  44. https://kirj.ee/wp-content/plugins/kirj/pub/EJA-2023-3S-50-82_20231125134314.pdf
  45. https://mises.org/mises-wire/enclosure-movement-and-agricultural-and-industrial-revolutions
  46. https://www.bbc.co.uk/history/british/empire_seapower/agricultural_revolution_01.shtml
  47. https://www.ans.iastate.edu/about/history/people/robert-bakewell
  48. https://www.rbst.org.uk/robert-bakewell-a-pioneer-of-modern-livestock-farming
  49. https://bahs.org.uk/AGHR/ARTICLES/52n1a3.pdf
  50. https://www.fao.org/4/x6115e/x6115e03.htm
  51. https://www.fao.org/4/a0158e/a0158e02.htm
  52. https://www.propublica.org/article/a-history-of-fda-inaction-on-animal-antibiotics
  53. https://www.nationalchickencouncil.org/about-the-industry/history/
  54. https://livestock.extension.wisc.edu/articles/the-chicken-of-tomorrow/
  55. https://www.vox.com/future-perfect/24079424/factory-farming-facts-meat-usda-agriculture-census
  56. https://swnydlfc.cce.cornell.edu/submission.php?id=1810&crumb=livestock
  57. https://livinghistoryfarm.org/farming-in-the-1950s/crops/beef-feedlots-ibp/
  58. https://vertexeng.com/insights/the-environmental-impacts-of-concentrated-animal-feeding-operations-cafos/
  59. https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/animal-production-system
  60. https://www.fao.org/4/i2414e/i2414e.pdf
  61. https://pmc.ncbi.nlm.nih.gov/articles/PMC6951865/
  62. https://www.fao.org/4/i2414e/i2414e05.pdf
  63. https://www.ers.usda.gov/topics/farm-practices-management/crop-livestock-practices/livestock-production-practices
  64. https://pmc.ncbi.nlm.nih.gov/articles/PMC10561603/
  65. https://www.farm4tradesuite.com/blog/management-systems-for-livestock-farming
  66. https://alliancebioversityciat.org/stories/sustainable-livestock-farming-practices-resilience
  67. https://www.woah.org/fileadmin/Home/eng/Current_Scientific_Issues/docs/pdf/eng_guide.pdf
  68. https://www.vet.cornell.edu/animal-health-diagnostic-center/programs/nyschap/modules-documents/best-management-practices
  69. https://www.uaex.uada.edu/publications/PDF/fsa-3060.pdf
  70. https://www.umass.edu/agriculture-food-environment/crops-dairy-livestock-equine/fact-sheets/basics-for-livestock-equine-nutrition
  71. https://www.fao.org/4/v9327e/v9327e05.htm
  72. https://extension.umn.edu/dairy-nutrition/ruminant-digestive-system
  73. https://extension.psu.edu/animals-and-livestock/beef-cattle/nutrition-and-feeding/
  74. https://water.unl.edu/article/animal-manure-management/dietary-strategies-reduce-nitrogen-and-phosphorus-excretion-feedlot/
  75. https://njaes.rutgers.edu/fs1064/
  76. https://pmc.ncbi.nlm.nih.gov/articles/PMC12108234/
  77. https://pmc.ncbi.nlm.nih.gov/articles/PMC11394234/
  78. https://www.navfarm.com/blog/fcr-guide/
  79. https://www.sciencedirect.com/science/article/pii/S0034528817304915
  80. https://pmc.ncbi.nlm.nih.gov/articles/PMC5732344/
  81. https://www.sciencedirect.com/science/article/pii/S0022030217310366
  82. https://www.ebsco.com/research-starters/agriculture-and-agribusiness/animal-breeding-and-husbandry
  83. https://www.sciencedirect.com/science/article/abs/pii/S030162269800147X
  84. https://bmcvetres.biomedcentral.com/articles/10.1186/s12917-022-03325-1
  85. https://www.morningagclips.com/the-original-ai-the-development-of-livestock-artificial-insemination/
  86. https://www.merckvetmanual.com/management-and-nutrition/embryo-transfer-in-farm-animals/overview-of-embryo-transfer-in-farm-animals
  87. https://www.fda.gov/animal-veterinary/animal-cloning/primer-cloning-and-its-use-livestock-operations
  88. https://www.pnas.org/doi/10.1073/pnas.1501718112
  89. https://pmc.ncbi.nlm.nih.gov/articles/PMC7552752/
  90. https://pmc.ncbi.nlm.nih.gov/articles/PMC10575306/
  91. https://www.sciencedirect.com/science/article/pii/S0022030201702135
  92. https://bmcgenomics.biomedcentral.com/articles/10.1186/s12864-024-10842-w
  93. https://www.journalofdairyscience.org/article/S0022-0302%2823%2900709-9/fulltext
  94. https://pmc.ncbi.nlm.nih.gov/articles/PMC7125876/
  95. https://www.aphis.usda.gov/sites/default/files/small_scale_is_biosecurity.pdf
  96. https://pmc.ncbi.nlm.nih.gov/articles/PMC12016774/
  97. https://www.researchgate.net/publication/392696444_Investigating_the_Efficacy_of_Vaccination_Programs_for_Preventing_Foot_and_Mouth_Disease_in_Cattle_A_Medical_Perspective
  98. https://www.veterinariadigital.com/en/articulos/common-diseases-in-cattle/
  99. https://www.aphis.usda.gov/livestock-poultry-disease
  100. https://healthforanimals.org/animal-health-in-data/antimicrobial-resistance/global-trends-in-animal-antibiotic-use/
  101. https://www.cidrap.umn.edu/antimicrobial-stewardship/antibiotic-use-livestock-rise-30-globally-2040-according-new-estimates
  102. https://www.fda.gov/animal-veterinary/safety-health/antimicrobial-resistance
  103. https://pmc.ncbi.nlm.nih.gov/articles/PMC12304651/
  104. https://www.fao.org/dad-is/en/
  105. https://agtr.ilri.org/global-perspective/diversity-animal-genetic-resources-invaluable-future-developments.html
  106. https://academic.oup.com/af/article/11/5/20/6404341
  107. https://livestockconservancy.org/2022/08/29/livestock-diversity-for-food-security/
  108. https://aquaculturemag.com/2022/11/28/mapping-diversity-of-species-in-global-aquaculture/
  109. https://www.globalseafood.org/advocate/is-the-lack-of-species-diversification-in-global-aquaculture-a-major-concern/
  110. https://agricultureandfoodsecurity.biomedcentral.com/articles/10.1186/s40066-023-00457-x
  111. https://www.youtube.com/watch?v=b8nXFBEB4Vc
  112. https://www.fao.org/statistics/highlights-archive/highlights-detail/agricultural-production-statistics-2010-2023/en
  113. https://openknowledge.fao.org/bitstreams/df90e6cf-4178-4361-97d4-5154a9213877/download
  114. https://healthforanimals.org/animal-health-in-data/sustainability/how-better-animal-health-supports-sustainable-food-systems/
  115. https://databank.worldbank.org/metadataglossary/world-development-indicators/series/AG.PRD.LVSK.XD
  116. https://www.ams.usda.gov/sites/default/files/media/Leather%2520Meal%2520TR.pdf
  117. https://www.epa.gov/npdes/animal-feeding-operations-uses-manure
  118. https://agtr.ilri.org/global-perspective/diversified-uses-livestock.html
  119. https://www.worldbank.org/en/topic/agriculture/brief/moving-towards-sustainability-the-livestock-sector-and-the-world-bank
  120. https://www.fao.org/newsroom/detail/fao-hosts-global-conference-on-sustainable-livestock-transformation/en
  121. https://www.fao.org/newsroom/detail/fao-statistical-yearbook-2024-reveals-critical-insights-on-the-sustainability-of-agriculture-food-security-and-the-importance-of-agrifood-in-employment/en
  122. https://www.sciencedirect.com/science/article/pii/S2211912423000524
  123. https://www.oecd.org/en/publications/2025/07/oecd-fao-agricultural-outlook-2025-2034_3eb15914.html
  124. https://www.ers.usda.gov/amber-waves/2024/june/u-s-exports-of-animal-agricultural-commodities-face-many-similar-threats-and-opportunities
  125. https://www.usimportdata.com/blogs/us-food-exports
  126. https://www.dairyfoods.com/articles/97959-us-dairy-exports-top-8-billion-in-2024
  127. https://www.usmef.org/news/u-s-pork-exports-record-large-in-2024-beef-export-value-trends-higher-1
  128. https://www.seair.co.in/blog/biggest-exporters-of-food.aspx
  129. https://apps.fas.usda.gov/psdonline/circulars/livestock_poultry.pdf
  130. https://www.oecd.org/en/publications/2025/07/oecd-fao-agricultural-outlook-2025-2034_3eb15914/full-report/meat_5462e384.html
  131. https://www.oecd.org/en/publications/2025/07/oecd-fao-agricultural-outlook-2025-2034_3eb15914/full-report/dairy-and-dairy-products_1dd2e5a6.html
  132. https://www.fao.org/dairy-production-products/production/farm-practices/en
  133. https://extension.psu.edu/animals-and-livestock/dairy/health-and-care
  134. https://extension.psu.edu/animals-and-livestock/dairy/facilities-and-technology
  135. https://www.sciencedirect.com/science/article/pii/S0022030220302988
  136. https://pmc.ncbi.nlm.nih.gov/articles/PMC9564990/
  137. https://www.thebullvine.com/management/11-proven-strategies-to-lower-feed-costs-and-boost-efficiency-on-your-dairy/
  138. https://www.fao.org/4/t0413e/T0413E08.htm
  139. https://www.gea.com/en/dairy-farming/
  140. https://www.firstdistrict.com/modern-technology-on-dairy-farms/
  141. https://www.fao.org/4/ba0027e/ba0027e00.htm
  142. https://pmc.ncbi.nlm.nih.gov/articles/PMC8470115/
  143. https://www.msdvetmanual.com/management-and-nutrition/health-management-interaction-dairy-cattle/the-health-management-program-in-dairy-cattle
  144. https://core.ac.uk/download/37325384.pdf
  145. https://pubmed.ncbi.nlm.nih.gov/34274250/
  146. https://extension.psu.edu/grass-fed-beef-production/
  147. https://www.sciencedirect.com/science/article/pii/S1751731121001385
  148. https://www.ers.usda.gov/topics/animal-products/hogs-pork/sector-at-a-glance
  149. https://agribusinessspace.com/free-range-vs-confined-livestock-systems-an-analytical-perspective/
  150. https://extension.oregonstate.edu/animals-livestock/swine/benefits-challenges-pasture-based-pork-production
  151. https://www.sciencedirect.com/science/article/abs/pii/S0264837714000179
  152. https://openknowledge.fao.org/bitstreams/15cb8917-378c-40ef-9aab-9684def0e84c/download
  153. https://www.wattagnet.com/broilers-turkeys/broilers/article/15635594/worldwide-poultry-meat-production-outpaces-production-of-other-meat-sources
  154. https://www.fao.org/poultry-production-products/production/en/
  155. http://www.agritech.tnau.ac.in/animal_husbandry/ani_chik_breeds%2520of%2520chicken.html
  156. https://www.livine.io/blogs/broiler-vs-layer-chicken-understanding-key-differences
  157. https://www.retechchickencage.com/news/differences-between-battery-cage-system-and-free-range-system/
  158. https://www.dol-sensors.com/free-range-vs-cage-systems-in-poultry-production/
  159. https://extension.psu.edu/animals-and-livestock/poultry/production-and-management/
  160. https://www.poultryhub.org/all-about-poultry/husbandry-management
  161. https://pmc.ncbi.nlm.nih.gov/articles/PMC9230070/
  162. https://jackson.agrilife.org/files/2020/04/Basic-Management-of-Intensive-Poultry-Production-11-14-16.pdf
  163. https://www.ers.usda.gov/topics/animal-products/aquaculture
  164. https://www.fao.org/newsroom/detail/fao-report-global-fisheries-and-aquaculture-production-reaches-a-new-record-high/en
  165. https://www.fisheries.noaa.gov/topic/aquaculture
  166. https://pmc.ncbi.nlm.nih.gov/articles/PMC2935128/
  167. https://www.alimentarium.org/en/fact-sheet/history-aquaculture
  168. https://www.fao.org/4/ag158e/ag158e02.htm
  169. https://www.nature.com/articles/s41586-021-03308-6
  170. https://www.fao.org/3/cc0461en/online/sofia/2022/aquaculture-production.html
  171. https://www.seafish.org/responsible-sourcing/aquaculture-farming-seafood/species-farmed-in-aquaculture/
  172. https://pmc.ncbi.nlm.nih.gov/articles/PMC3353277/
  173. https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2021.666662/full
  174. https://www.fisheries.noaa.gov/s3/2022-03/Fact-Sheet-Potential-Risks-of-Aquaculture-Escapes.pdf
  175. https://www.sciencedirect.com/science/article/pii/S2351989419305888
  176. https://www.sciencedirect.com/science/article/pii/S0048969725010514
  177. https://www.nature.com/articles/s41467-024-49556-8
  178. https://blogs.edf.org/edfish/2024/08/15/sustainability-starts-with-health-disease-prevention-and-management-in-aquaculture/
  179. https://www.oceans-research.com/future-of-sustainable-aquaculture/
  180. https://apiaryinspectors.org/US-beekeeping-survey-24-25
  181. https://agriculture.auburn.edu/feature/u-s-beekeeping-survey-reveals-highest-honeybee-colony-losses-during-2024-2025/
  182. https://www.fortunebusinessinsights.com/apiculture-market-108593
  183. https://inserco.org/en/statistics
  184. https://www.futuremarketinsights.com/reports/silk-market
  185. https://www.sciencedirect.com/science/article/pii/S2352550925000582
  186. https://www.researchgate.net/publication/393744286_Global_Perspective_on_Silk_An_Economic_Analysis_of_International_Sericulture_Trade
  187. https://jiminys.com/blogs/sustainability/insect-protein-farming
  188. https://www.sciencedirect.com/science/article/pii/S2949824423001337
  189. https://link.springer.com/article/10.1007/s13593-017-0452-8
  190. https://earth.org/insect-farming/
  191. https://www.nature.com/articles/s44264-025-00075-z
  192. https://www.welthungerhilfe.org/global-food-journal/rubrics/climate-resources/insects-as-climate-friendly-alternative-to-meat-a-myth
  193. https://www.fao.org/4/i3253e/i3253e.pdf
  194. https://food.ec.europa.eu/food-safety/novel-food/authorisations/approval-insect-novel-food_en
  195. https://www.fao.org/newsroom/story/-Worm-up-to-the-idea-of-edible-insects/en
  196. https://www.mordorintelligence.com/industry-reports/global-insect-protein-market
  197. https://ecoevorxiv.org/repository/object/6919/download/13292/
  198. https://www.epa.gov/agstar/practices-reduce-methane-emissions-livestock-manure-management
  199. https://www.fao.org/statistics/highlights-archive/highlights-detail/greenhouse-gas-emissions-from-agrifood-systems.-global--regional-and-country-trends--2000-2022/en
  200. https://thebreakthrough.org/issues/food-agriculture-environment/livestock-dont-contribute-14-5-of-global-greenhouse-gas-emissions
  201. https://globalresearchalliance.org/wp-content/uploads/2023/11/Ouatahar_STOTEN2021.pdf
  202. https://www.pnas.org/doi/10.1073/pnas.1011013108
  203. https://www.nature.com/articles/s41893-024-01433-4
  204. https://www.sciencedirect.com/science/article/pii/S0959378021000595
  205. https://www.openaccessgovernment.org/devastating-water-footprint-animal-agriculture/163485/
  206. https://water.usgs.gov/owq/AFO/proceedings/afo/OFR/OFR_00-204.pdf
  207. https://pmc.ncbi.nlm.nih.gov/articles/PMC11299730/
  208. https://www.wellbeingintlstudiesrepository.org/cgi/viewcontent.cgi?article=1000&context=ethawel
  209. https://pmc.ncbi.nlm.nih.gov/articles/PMC4810049/
  210. https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2024.1429097/full
  211. https://pmc.ncbi.nlm.nih.gov/articles/PMC10931348/
  212. https://www.physoc.org/magazine-articles/cortisol-often-not-the-best-indicator-of-stress-and-poor-welfare/
  213. https://www.sciencedirect.com/science/article/abs/pii/S0167587723002222
  214. https://www.sciencedirect.com/science/article/pii/S1751731124002489
  215. https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2023.1167016/full
  216. https://www.researchgate.net/publication/349123407_Evaluation_of_Animal_Welfare_in_Extensive_and_Intensive_Dairy_Farms_and_its_Correlation_to_Infectious_Diseases
  217. https://www.frontiersin.org/journals/sustainable-food-systems/articles/10.3389/fsufs.2020.545902/full
  218. https://www.sciencedirect.com/science/article/pii/S1751731120301452
  219. https://royalsocietypublishing.org/doi/10.1098/rsbl.2024.0382
  220. https://pmc.ncbi.nlm.nih.gov/articles/PMC5082305/
  221. https://www.sciencedirect.com/science/article/abs/pii/S0924224421006774
  222. https://www.mdpi.com/2071-1050/15/4/3324
  223. https://pmc.ncbi.nlm.nih.gov/articles/PMC9318327/
  224. https://www.sciencedirect.com/science/article/pii/S0022316622131378
  225. https://pmc.ncbi.nlm.nih.gov/articles/PMC10665534/
  226. https://pmc.ncbi.nlm.nih.gov/articles/PMC5023012/
  227. https://www.frontiersin.org/journals/nutrition/articles/10.3389/fnut.2025.1525011/full
  228. https://www.bmj.com/content/370/bmj.m2412
  229. https://pmc.ncbi.nlm.nih.gov/articles/PMC8305097/
  230. https://academic.oup.com/af/article/13/2/11/7123475
  231. https://www.fao.org/cfs/cfs-hlpe/insights/news-insights/news-detail/livestock-engine-for-economic-growth-and-sustainability/en
  232. https://livestockdata.org/publications/fact-check-2-livestock-and-economy
  233. https://openknowledge.worldbank.org/entities/publication/e22d74ae-42fd-5662-a746-70c67d3c55f4
  234. https://www.sciencedirect.com/science/article/pii/S1751731112001954
  235. https://academic.oup.com/af/article/13/1/3/7052105
  236. https://pmc.ncbi.nlm.nih.gov/articles/PMC10546065/
  237. https://jn.nutrition.org/article/S0022-3166%2823%2902576-2/fulltext
  238. https://www.sciencedirect.com/science/article/abs/pii/S0278416584710154
  239. https://pmc.ncbi.nlm.nih.gov/articles/PMC4093044/
  240. https://arcicalabria.it/how-cultural-values-shape-animal-farming-practices-over-time/
  241. https://pmc.ncbi.nlm.nih.gov/articles/PMC8868101/
  242. https://www.frontiersin.org/journals/environmental-science/articles/10.3389/fenvs.2022.1049187/full
  243. https://www.leap.ox.ac.uk/environmental-impacts-intensive-and-extensive-systems
  244. https://pmc.ncbi.nlm.nih.gov/articles/PMC11971519/
  245. https://www.researchgate.net/publication/344773159_Animal_Welfare_in_Extensive_Production_Systems_Is_Still_an_Area_of_Concern
  246. https://www.tandfonline.com/doi/full/10.1080/10888705.2021.1992280
  247. https://www.theguardian.com/environment/2022/jun/23/free-range-extensive-farming-may-risk-more-animal-borne-pandemics-than-intensive-factory-farming-study
  248. https://www.sciencedirect.com/science/article/pii/S0308521X23002032
  249. https://news.mit.edu/2024/study-finds-lands-grazing-can-worsen-help-climate-change-0315
  250. https://academic.oup.com/erae/article/50/4/1482/7219679
  251. https://pmc.ncbi.nlm.nih.gov/articles/PMC7929601/
  252. https://pmc.ncbi.nlm.nih.gov/articles/PMC7435039/
  253. https://www.frontiersin.org/journals/sustainable-food-systems/articles/10.3389/fsufs.2023.1234108/full
  254. https://civileats.com/2021/01/06/a-new-study-on-regenerative-grazing-complicates-climate-optimism/
  255. https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019WR026995
  256. https://pubmed.ncbi.nlm.nih.gov/21309458/
  257. https://www.sciencedirect.com/science/article/abs/pii/S187114131630035X
  258. https://sentientmedia.org/how-does-agriculture-cause-deforestation/
  259. https://gfr.wri.org/forest-extent-indicators/deforestation-agriculture
  260. https://www.sciencedirect.com/science/article/pii/S0959378018314365
  261. https://www.sciencedirect.com/science/article/pii/S0959378025000482
  262. https://www.researchgate.net/publication/394408050_Environmental_Impact_and_Mitigation_Approaches_in_Livestock_Production_Systems_A_Review
  263. https://www.nature.com/articles/s41598-025-13150-9
  264. https://www.sciencedirect.com/science/article/pii/S2772411524000727
  265. https://philosophynow.org/issues/36/Defending_Animal_Rights_by_Tom_Regan
  266. https://eganphilosophy.com/animal-rights-animal-welfare/
  267. https://pubmed.ncbi.nlm.nih.gov/27819303/
  268. https://pmc.ncbi.nlm.nih.gov/articles/PMC7286991/
  269. https://veterinaryworld.org/Vol.18/October-2025/7.pdf
  270. https://pmc.ncbi.nlm.nih.gov/articles/PMC9947326/
  271. https://www.sciencedirect.com/science/article/pii/S0022030222005458
  272. https://www.researchgate.net/publication/392687248_A_systematic_review_and_meta-analysis_of_physical_environmental_enrichment_to_improve_animal_welfare-related_outcomes_in_indoor_cattle
  273. https://law.lclark.edu/live/files/9495-duckler--two-major-flaws-of-the-animal-rights
  274. https://efsa.onlinelibrary.wiley.com/doi/full/10.2903/j.efsa.2025.9518
  275. https://www.mdpi.com/2077-0472/13/9/1652
  276. https://www.frontiersin.org/journals/animal-science/articles/10.3389/fanim.2021.639678/full
  277. https://www.choicesmagazine.org/choices-magazine/submitted-articles/precision-livestock-farming-technologies-in-beef-cattle-production-current-and-future
  278. https://pmc.ncbi.nlm.nih.gov/articles/PMC10494883/
  279. https://www.sciencedirect.com/science/article/pii/S2772375525001224
  280. https://pmc.ncbi.nlm.nih.gov/articles/PMC7601240/
  281. https://www.sciencedirect.com/science/article/pii/S2772375524000467
  282. https://animalscipublisher.com/index.php/amb/article/html/3813/
  283. https://clinicaltheriogenology.net/index.php/CT/article/view/10399/16996
  284. https://www.mdpi.com/2076-2615/15/2/277
  285. https://academic.oup.com/af/article/6/1/15/4638770
  286. https://www.researchgate.net/publication/264168651_Marker_Assisted_Selection-Applications_and_Evaluation_for_Commercial_Poultry_Breeding
  287. https://pubmed.ncbi.nlm.nih.gov/17504955/
  288. https://www.biovenic.com/marker-assisted-selection-in-animal-breeding.htm
  289. https://www.bmbreports.org/view.html?uid=1943&vmd=Full
  290. https://www.avma.org/news/advances-animal-genome-editing-continue-apace
  291. https://pmc.ncbi.nlm.nih.gov/articles/PMC10598601/
  292. https://www.mdpi.com/2077-0472/15/20/2155
  293. https://icontechjournal.com/index.php/iij/article/view/364
  294. https://bmcgenomics.biomedcentral.com/articles/10.1186/s12864-025-11247-z
  295. https://www.archivemarketresearch.com/reports/animal-genetic-products-380824
  296. https://www.sciencedirect.com/science/article/pii/S2451943X24000498
  297. https://hereditasjournal.biomedcentral.com/articles/10.1186/s41065-023-00285-w
  298. https://www.fao.org/newsroom/detail/unlocking-the-potential-of-sustainable-livestock-production/en
  299. https://saiplatform.org/uploads/Modules/Library/lrg-sai-livestock-mitigation_web2.pdf
  300. https://pmc.ncbi.nlm.nih.gov/articles/PMC11267467/
  301. https://research.wri.org/wrr-food/course/reduce-greenhouse-gas-emissions-agricultural-production-synthesis
  302. https://academic.oup.com/af/article/13/5/3/7311123
  303. https://unfccc.int/sites/default/files/resource/2_FAO_Carolyn_UNFCCC%2520Koronivia%2520Nov%25202020_Livestock%2520Adaptation.pdf
  304. https://pmc.ncbi.nlm.nih.gov/articles/PMC9755366/
  305. https://www.fao.org/4/u7600t/u7600t01.htm
  306. https://www.frontiersin.org/journals/sustainable-food-systems/articles/10.3389/fsufs.2025.1566194/pdf
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