You never saw Stand by Me?
Pluto is a dog. Goofy is some kind of mutant space creature. In many of the cartoons in which Goofy appears, there are other characters of the same species.
In the Disney universe, most of the characters are anthropomorphic animals. The character known as Black Pete is an oversized cat and an archetypal bully in the old Disney classics – but little Figaro, from the same era, is very much an ordinary house cat.