My cuckoo marans roo has had this sore for a couple of months now. he has the same identical sore on the other side of his comb, almost like someone shot him with a small caliber gun or something. However, I know that this did not happen to him. There are no kids (or trigger-happy adults) living anywhere near the area. It is a sore. All of my hens' combs are perfectly fine. What's going on with him?