I've always defined an animal as a creature that eats other living things and is not a person. But, does that mean the Protoss from starcraft would be animals? I mean, they're just as smart as humans, actually they're smarter. So I think it would be unfair to put them in the same category as say, a cow. What about elves, or orcs? Are all those things animals? What about cro-magnon man or Neanderthals? At what point does a creature cease to be an animal?