The Flintstones

The Flintstones is an animated, prime-time American television sitcom that was broadcast from September 30, 1960 to April 1, 1966, onABC. The show, produced by Hanna-Barbera, fancifully depicted the lives of a working-class Stone Age man, his family, and his next-door neighbor and best friend.

The Hypnotist (Season 1, Episode 20)
While attempting to demonstrate his skill as a hypnotist to his wife and the Rubbles, Fred manages to hypnotize Barney into thinking that he is a frisky puppy, but is unable to reverse the trick.