Firehouse Dog is a 2007 American family film produced by Regency Enterprises and distributed by 20th Century Fox. Directed by Todd Holland, it stars Josh Hutcherson, Bruce Greenwood, Dash Mihok, Steven Culp and Bill Nunn. It was released on April 4, 2007, in the United States. It received negative reviews for its scatological humor.

Irish Terrier Dog superstar Rexxx lives the high life with adoring crowds, a loving owner and an array of best-selling blockbusters under his belt. Unfortunately, when his owner Trey tries to convince him to perform a skydiving stunt and Rexxx is airborne, a lightning strike causes the plane to malfunction. Rexxx tumbles from the sky, landing in a tomato truck. While Trey mourns his dog's apparent death and regrets his failure to treat Rexxx like a "real dog", Rexxx settles into an abandoned warehouse, desperately missing his owner.

Meanwhile, in the city of South Harbor in Lincoln County, Shane Fahey is mourning the death of his uncle, Capt. Marc Fahey, and Blue (The former "Firehouse Dog") after they were trapped in a fire in a disused textile mill. Realizing he forgot to study for a test, Shane ditches school, but is quickly caught by two other firefighters, Lionel and new recruit Terrence. Arriving at the fire station (known as 'Dogpatch', home to Engine 55 & Rescue 26) in disgrace, he is chastised by both driver Joe and his own father Connor, the recently promoted Captain, who is having problems of his own. The station is about to be closed due to a lack of funding and overall bad publicity. Before Connor can properly address his son's problems, Dogpatch is called out to a fire in a derelict apartment building. Due to a slow suit-up and Engine 55 having engine trouble, the team is the last to arrive and is put on standby by rival Greenpoint station Captain Jessie Presley. Shane notices a terrified Rexxx balancing atop the burning building; Connor manages to rescue him and orders Shane to put up "Lost Dog" flyers. Due to the name on his collar (a prop from filming at the time of Rexxx's accident), the station renames the dog Dewey and keeps him until someone claims him.

While city manager Zachary Hayden reminds Connor of the station's upcoming shutdown, Shane struggles to cope with Dewey's spoilt needs and strange habits. Realizing the dog is fast and active, Shane enters him in a firefighter's competition, where they are pitted against rival fire station Engine 24 Greenpoint. Although Dewey initially beats the other station's score, he is distracted by their Dalmatian, who reminds him of a female Dalmatian that broke his heart. Despite losing the competition, Shane and Dewey begin to bond.

The next morning, the station is called out to a tunnel collapse. Everyone has already been evacuated upon their arrival, but Capt. Fahey notices Captain Presley is unaccounted for and initiates a search. Connor rushes into the wreckage, and Shane, fearing for his father's safety, allows Dewey to run in after him. Dewey alerts Connor to Jessie's presence, saving her life. Following this, the station begins to gain popularity, as they realize Dewey could become a potential firehouse dog. Due to this change in circumstances, Zachary notifies them that the station is saved.

Shane's excitement disappears when he discovers his father has moved to his uncle's former office. Angered that his dad is apparently trying to take his uncle's place, he roots through the files, where he discovers an unnerving number of suspected arsons within the general area of the station. Upset that Shane felt he was being neglected, Connor makes an effort to reconcile with his son, and is shocked when Shane reveals that he feels guilty for being relieved that it was his uncle who died instead of his father. Later that night, Dewey is awarded a medal for his bravery at a firefighter's gala. However, the dog ends up reuniting with Trey upon spotting him among the attendees; Connor reluctantly allows an ecstatic Trey to keep the dog.

A few hours later, Dewey escapes Trey's hotel room to chase after the station's engine, which was called out to another fire on a garbage barge at the City Harbor. The team is only too happy to allow him to climb aboard. As they struggle to put the barge fire out, Shane returns to the station and discovers that the fire was simply a decoy, so that the suspected arsonist could burn the "Dogpatch" station to the ground. Panicking, he calls his friend JJ (Jessie's daughter) to figure out what to do, before hearing the arsonist's footsteps upstairs.

Ignoring JJ's warnings, Shane heads upstairs for a confrontation. To his horror, the arsonist is city manager Zach Hayden. Hayden wanted to destroy buildings in Engine 55's patch in order to build a football stadium for City Chief Corbin Sellars – killing Shane's uncle in the process. After the station's closure was denied, Zach felt he had no choice but to burn it down himself, but didn't know Shane was inside. The two are trapped in the burning building when Zach's incendiary device ignites; Shane loses consciousness and Zach is forced to leave the building prematurely.