Goofy has evolved to a walking adult on two legs . He also wears clothes & a hat. So he has been humanized where Pluto is a pup & still out of control & crazy. he is restrained at times on a chain. he wears a collar & nothing else but his pelt. it separates the boys from the men.
Not all dogs are the same. There's Doberman Pinschers, there's Boston Terriers, pugs, Paris Hilton, etc. point is, dogs aren't all the same, some walk, some scrawl, some bark, some yelp. clifford was taller than a house! and red!