I have recently discovered that one of my new chickens has an actual hole in her head! I assume my older, bigger meat chickens must've picked on her because she is a smaller egg chicken and was only recently introduced to the flock. The hole is a bit bigger than my pinkie nail and the skin around it is black. I don't want to kill this one if there's a chance of saving her because of an unlucky year with chickens. Is there anything I can do to help her?