Hi I bought a bunny about a week ago and he was fine when we first got him now for about the last three days he has not eaten alot and he has a very bad odor and he has diareah. Is there something that I am doing wrong? I let him out of the cage tonight to run around the basement and he is very hyper. I rinsed his but off with water where he had it all over him. Please help me I do not want anything to happen to him. Thank you