Last night I noticed one of my brooding hens was missing (she barely leaves the box) and my rooster, Hickory, looked really beaten up. The back of his neck is bare and there's a penny sized opening (I cleaned it up a bit so it scabbed a little at least). His tail feathers are also missing, and he's lowering his head because it's probably really painful to raise it. Is there anything I can do to help him heal? I don't want him to die. I have him in a separate coop so the other hens don't pick on him.