Slim is Butch's friend. He is seen playing cards with other dogs.
Slim is seen playing poker with other dogs when Butch addresses him as a friend when he gives Diggs a quick tour at D.O.G. Headquarters. Slim says "Hey, Butch" (this is his only line in the movie) Butch replies with "Hey, Slim." Slim is seen in Cats & Dogs: The Revenge of Kitty Galore.
- Slim wears a grey hoody and sun glasses.
- Slim plays poker.
- Slim is friends with Butch.