I have now 3 hens and 2 roosters. About 1 yr old, raised together since 3 days old. Everyone gets along. But the hens are losing feathers to saddle area. I noticed one hen has a sore. I cleansed it with medicated shampoo,and sprayed Vetericyn antimicrobial spray. Not sure I will be able to get it to heal. Could it be due to the humping?