We have a year old Buff Orpington named Betsy. In the last couple of months, she has developed black spots on her combs. They are little raised bumps. Starting about a month ago, Betsy's behavior was completely different. She always runs away from us, and she started sitting on her eggs more. One of our other Buffs has also been bullying her, and that might be what the bumps are? I don't know what she has, if she has any disease, but any information would be appreciated. Thank you!