Pluto is Mickey Mouse's pet and is not anthropomorhic. Not to be confused with Goofy that is an anthropomorphic dog and Mickey's friend.

And Minnie is a mouse and has a cat as a pet, Figaro.

Here's the funny thing about cartoons and confusion. In the comic Popeye the antagonist is named "Bluto" but only sometimes. He was renamed as "Brutus" because of a misunderstanding of rights ownership.

https://en.wikipedia.org/wiki/Bluto#Bluto_vs._Brutus

However, because it was a misunderstanding, his "Bluto" moniker was later restored, and even retconned as the name of twin brothers.

Popeye has never been a Disney property. But the funny thing is that my father told me that they renamed "Bluto" so that he wasn't phonetically confused with "Pluto", who is obviously a different character in a different property. And that premise is the one that I grew up believing, until Wikipedia was invented.