Trigger, Roy Rogers' beautiful Golden Palomino stallion, and co-star with Roy in many of his movies and Roy's TV show, was often billed as "the smartest horse in the movies". The two of them appeared in dozens of films in the 1930s and 40s, always chasing and thwarting the bad guys, and working to serve peace and justice. Trigger even shared the movie title with Roy on two occasions: My Pal Trigger (1946) and Trigger, Jr. (1950).

Source: IMDB