Copper is the deuteragonist of Disney's 1981 feature film, The Fox and the Hound, and its 2006 midquel. He is a hound dog who becomes best friends with a fox named Tod, despite the fact that the two are supposed to be natural enemies.
Obviously, don't nominate any human characters. Hybrids like Cheetah or The Lizard are okay, as are shapeshifters with one set animal form (eg Professor McGonagall.)
