The film takes place in a 1950s-esque alternate universe where radiation from space has turned the dead into zombies. This resulted in the "Zombie Wars", where humanity battled zombies to prevent a zombie apocalypse, with humanity the ultimate victor. The radiation still plagues humanity, as all those who die after the original contamination turn into the undead, unless the dead body is disposed of by decapitation or cremation. In order to continue living normal lives, communities are fenced with the help of a governing corporation named ZomCon. ZomCon provides collars with accompanying remote controls to control the zombies' hunger for flesh so as to use them as slaves or servants.
In the town of Willard housewife Helen Robinson (Carrie-Anne Moss) buys a zombie in spite of her husband Bill's (Dylan Baker) zombie phobia, as Bill has had bad experiences with zombies having been a veteran of the Zombie Wars. Their son, Timmy (K'Sun Ray), befriends the zombie, naming him "Fido" (his true name is never revealed, and little is revealed of his "pre-zombie" life, except that he died of myocardial infarction, and at one point Helen wishes she had met him before she got married and when he was still alive). One day, Fido's collar malfunctions and he kills their next door neighbor, who turns into a zombie. Timmy "kills" the zombified neighbor later, but not before she kills and infects another person, causing a small outbreak. ZomCon security forces quell the situation and then investigate what caused the outbreak.
When a pair of local bullies are blamed for the missing neighbor, they capture Fido and Timmy. Fido escapes and runs to find Helen, who comes and rescues Timmy from the bullies (who, through misadventure and Fido's hunger for human flesh, are now zombies), and they try to forget about the whole thing. Several days later, the neighbor's body is found and the murder is traced back to Fido, who is taken away to ZomCon where the public is told he will be destroyed. Timmy learns through Cindy Bottoms (Alexia Fast), daughter of Jonathan Bottoms (Henry Czerny), ZomCon's abusive security chief, that Fido is simply working in a factory at ZomCon. Timmy sets out to rescue him with the help of Mr. Theopolis (Tim Blake Nelson), previous security chief of ZomCon who was forced into early retirement when it was discovered he was found guilty of fraternization with his female zombie, whom he has remarkably preserved well to retard her decaying process, thus giving her a relatively attractive appearance.
Meanwhile, Timmy locates Fido, but is captured by Mr. Bottoms, who attempts to throw Timmy into the zombie-infested "wild zone" that exists outside of the fenced communities. Bill comes to the rescue and is killed by Mr. Bottoms, who in turn is killed by Fido. Timmy is set free and the news media propagandizes that the ZomCon security breach was the fault of rednecks who venture out into the wild zone to hunt zombies for fun. Helen finally learns not to belittle Bill's bad experiences from the Zombie Wars by paying for a headless funeral in order to prevent his zombification. The film ends with Fido as a surrogate father and husband, Timmy, Helen and Helen's newborn baby by Bill as a new family. They, along with a few neighbors happily enjoy their new domestic lives together, including the zombified Jonathan Bottoms who is now more attentive to his daughter.K'Sun Ray as Timmy Robinson
Billy Connolly as Fido
Carrie-Anne Moss as Helen Robinson
Tim Blake Nelson as Mr. Theopolis
Dylan Baker as Bill Robinson
Henry Czerny as Jonathan Bottoms
Sonja Bennett as Tammy
Alexia Fast as Cindy Bottoms
Aaron Brown as Roy Fraser
Brandon Olds as Stan Fraser
Jennifer Clement as Dee Dee Bottoms
Rob LaBelle as Frank Murphy
Tiffany Lyndall-Knight as Miss Mills
Mary Black as Mrs. Henderson
Raymond E. Bailey as Floyd
Shooting took place in Kelowna, British Columbia over 35 days. Director Andrew Currie wanted to make a cross-genre film in order to make the result less predictable. Currie was influenced by Lassie Come Home, The Night of the Hunter, Douglas Sirk films of the 1950s, Peyton Place, and George A. Romero's zombie films. The script was originally written in 1994, but creative differences kept it tied up. Eventually, Currie optioned it through his production company and completed the picture. The film was completely storyboarded prior to filming.
Fido premiered at the 2006 Toronto International Film Festival, where it was the Opening Canadian Gala film. It was also shown at the 2007 Sundance Film Festival, the 2006 Vancouver International Film Festival, the 2007 Kingston Canadian Film Festival, the 2007 Florida Film Festival, and the 2007 Gérardmer Fantasy Filmfest in France. The theatrical release was March 9, 2007.
The film grossed $304,533 in the US and a total of $426,224 worldwide. Domestic DVD sales were $2.95 million.
The DVD was released on October 23, 2007.
Rotten Tomatoes, a review aggregator, reports that 73% of 73 surveyed critics gave the film a positive review, and the average rating was 6.5/10; the consensus is: "Making the most of its thin premise, Fido is an occasionally touching satire that provides big laughs and enough blood and guts to please gorehounds." Metacritic rated it 70/100 based on 12 reviews. Allan Walton of the Pittsburgh Post-Gazette rated it 5/5 stars and called it "the best zombie spoof ever". Kirk Honeycutt of The Hollywood Reporter wrote, "For a one-joke movie, "Fido" does a fine job exploring every possible permutation of that joke." Dennis Harvey of Variety called it a "frisky yet strangely familiar" film that is amusing but does not fulfill all of its promise. Manohla Dargis of The New York Times awarded it a NYT Critics' Pick and called it a "ticklishly amusing satire" that sacrifices opportunities for satire for comedy. Geoff Pevere of the Toronto Star described it as a "smartly entertaining if slightly oversweet fusion of Douglas Sirkian melodrama (and especially All That Heaven Allows), all-American fifties science fiction, George Romero chompdown and Homeland Security satire" that is "strangely wholesome, gently splattery and adorably gory." Robert Abele of the Los Angeles Times called it a "crafty" and "deliciously funny" film that shows "there's still a lot of life left in the zombie flick." Scott Weinberg of Fearnet called it "pretty funny, surprisingly smart, pleasant to look at, and often quite sick." Joshua Siebalt of Dread Central rated the film 4.5/5 stars and called it "a damn smart film" that "works on almost every level." Brad Miska of Bloody Disgusting wrote that the film may be a difficult sell to hardcore horror fans, but they will enjoy the comedy, gore, and originality. Joshua Rothkopf of Time Out New York rated the film 2/5 stars and called its satire tiresome and overdone. J. R. Jones of the Chicago Reader called it a "tired spoof" based on a throwaway gag from Shaun of the Dead. Rob Nelson of The Village Voice called it an unfunny zombie parody that pales in comparison to 28 Weeks Later.