Bert: The Misfits, the movie, Clark Gable, it was about horses being turned into dog food. The Misfits was a movie that came out in 1961 which was the last movie for both of the leading stars, Clark Gable and Marilyn Monroe. It tells the story of an aging ex-cowboy prone to gambling and surviving on mustang rustling. He sells the horses to slaughterhouses for the manufacture of dog food.