WTF – Goofy *is* a dog?

Guess I’m out of the loop. I thought he was a cow or something but pictures don’t lie, right? Really bothers me that Pluto *is* a dog and acts like a dog and Goofy doesn’t. Thinking there must be some bizarre genetic experiment going on behind the scenes at Disney. And wasn’t Goofy hooked up with a cow-lady?