My chinchilla max has always been clean and healthy. We introduced him to two new chinchillas about two months ago. Romeo and him get along great, but I think trio picks on max. Max seems to defend himself well and can run faster than trio, but I noticed max has started hibernating in certain areas. It seems he's not even leaving to go pee. His under belly is yellow and sometimes i'll pick him up and there is pee on his feet. I'm 80% sure it's trio, but does anyone have any other suggestions?