The dog in the movie “Turner & Hooch” is a Dogue de Bordeaux, also known as a French Mastiff.

This breed is a large, muscular mastiff-type dog from France, recognizable by its massive head, short fawn coat, and heavy drooling, which matches Hooch’s look and behavior in the film. The main dog who played Hooch was a Dogue de Bordeaux named Beasley.