The PATSY Award was originated by the Hollywood office of the American Humane Association in 1939. They decided to honor animal performers after a horse was killed in an on-set accident during the filming of the Tyrone Power film Jesse James. The letters are an acronym, and stand for Picture Animal Top Star of the Year. A later acronym was also included: Performing Animal Television Star of the Year. The American Humane Association is the organization responsible for the disclaimer at the end of many films and television programs that "No Animals Were Harmed" in the production.