In Homeward Bound, Chance (played by a dog named Rattler) was not only not the tough guy, but a goofball personality similar to what most people associate with a Golden Retriever. Ironically enough, his composed, wise companion was the Golden. Hollywood can brake the rules just as easily as they can make them.
Pictured: Poster artwork from author's collection; Homeward Bound: The Incredible Journey, featuring Golden Retriever "Shadow", Himalayan Cat "Sassy", and American Bulldog "Chance." Copyright The Walt Disney Company, 1993.
Readers may be interested in some of these films, all featuring American Bulldogs:
Bubble Boy (2001)
Cheaper by the Dozen (2004)
Cheaper by the Dozen 2 (2005)
The Little Rascals (1994)
The Pooch and the Pauper (1999) (Not available on DVD)
Return to Me (2000)
Squanto: A Warrior's Tale (1994)
Unaccompanied Minors (2006)
Wonder Boys (2000)