From George Smart's Wiki

Aside from the Chickens, we have a Dog called Bob and a Cat called Ozzie.

Bob

Bob is a chocolate Labrador retriever. He goes by many aliases: Bob, Bob-Dog, Bobstickle, Dogstickle, Dogbert and Bobski to name but a few.

Ozzie

Ozzie is a black cat. He, unlike Bob, doesn't have any aliases.