I went outside this morning to fill my chicken's feeder and let them free range. I noticed Scarlett, our alpha chicken, had feather missing just behind her wing. I picked her up to inspect and found a 2x2 inch "wound." The wound is red but doesn't appear to be actively bleeding. My chickens (6) are red sex-links and are about 5 months old. They appear to be in the early stages of molting as their back feathers are coming out. How do I treat Scarlett and keep the wound from getting worse? Any ideas on the cause?