Rocko's Modern Life

Rocko's Modern Life is an American animated television series created by Joe Murray for Nickelodeon. The series centers on the surreal life of an anthropomorphic Australian-immigrant wallaby named Rocko as well as his friends: the gluttonous steer Heffer, the neurotic turtle Filburt, and Rocko's faithful dog Spunky. It is set in the fictional town of O-Town, and is laden with adult humor, including double entendre, innuendo, and satirical social commentary.

Hypno Puppy Luv (Season 4, Episode 11)
Hefner hypnotizes Rocko to turn into a puppy, but things go haywire when the Bigheads adopt him as their new pet.