When no one tells you what you're supposed to be, it can open up a world of possibilities.
Take Bramble, for instance. Of course, he's supposed to be a deer. But since he was found unconscious and alone in a field at just 2 weeks old, he knew only the kindness of his rescuer, Geoff Grewcock, and the animals he shared a home with.
So he figured he would like to be a dog.