This rooster got into a fight, and he had some small cuts on his face which I believe have become infected. I have started him on penicillin, but is there anything else I can do for him? Could I drain any of the swelling? Are the yellow parts filled with pus or something? He is still moderately active, preens himself, drinks, etc. but he won't eat normal feed (probably because he can't see it). When he breathes it makes a hissing sound and I'm not sure whether he's trying to breathe through his nose or not. Could this be something other than just an infection? Sorry for the blurry pictures.