When I let my flock out this morning I noticed the base of the skull on my hen Red was bloody and raw. It looks like all the feathers have been pulled. I believe it might be a mating injury. We have 13 hens and 2 roos and they are about 5.5 months old. None of the other hens have any feathers missing. I brought her inside and put some neosporin on it and put her back out with the flock. It smelled foul What can I do for her?