A Duck. My friend got one, and at first it shits a lot (easy to clean) but they are SO fucking cool, especially when you're drunk or soemthing and they start nibbling you. And when they grow up, they follow you everywhere. BUt his hosue is a fucking  zoo, 4 cats, 3 dogs, 2 chickens, a duck, gerbils and shit, we catnip up the cats and make them fight the chickens. Hahaha