A line from this film where Turner yells at Hooch to not eat the car was used in animation test footage for Toy Story (1995). When Tom Hanks saw the test footage, it convinced him to take on the role of Sheriff Woody.
The trivia items below may give away important plot points.
The scene where Hooch dies, was the final scene filmed between Tom Hanks and Beasley the Dog, Hanks did a great deal of bonding with Beasley and used the fact that he'll never see him again to get himself to cry.
An alternate ending was filmed in which Hooch survives. Both endings were tested with different audiences. The endings scored the same. But the original ending provoked a passionate emotional response from the audience while the alternate ending elicited a quietly positive response. Disney production chief Jeffrey Katzenberg decided to use the original ending because that is what the filmmakers wanted.