Billy is swollen around his eye. Only once did I see white mucus around it. I have been giving him Amoxicillin with no change. He keeps scratching at it and I think that is what is aggravating it. I don't see any cuts but another squirrel was on top of his cage fighting with him a week ago. Is there something I can put on his eye to help it and how do I keep him from scratching at it?