I have adopted a boy who has deformed arms and at some point has had a bad infestation of ear mites and has a deformed ear. The vet says to watch him as he grows older for signs of arthritis. But that's not my question. My question is, why does the water in his bowl turn yellowish and greenish? Is he dropping food from his mouth into the clean water? The other rabbits don't do this. I'm so very happy to be able to rescue this wonderful boy!