Pet rabbit

I have some sort of semi aquatic pets in an aquarium that has just a little water in the bottom. I find a baby rabbit and put it in the aquarium. Later, I fill the aquarium full of water. A while later, I come back and am surprised the rabbit is still there, swimming around and eating. I decide I'll put it's food in a dry trough attached to the back of the aquarium to make it easier for it to eat.