I need some help on my rooster. Three days ago a possum got in the coop and killed my baby and injured my rooster it ripped his head open down to his skull and half of his comb is ripped off his head but still attached to the front half of it. The part that's ripped off is now black and I fear for gangreen. It also punctured his left eye so he is now blind in that eye and I worry it to could get infected. can I cut off the part of his comb affected? How do I do that? And anything to do for his eye? He is eating and drinking as well as still mounting his hens.