I have a small flock with 3 hens and 1 roo. They are all 11 months old, gotten at the same time. The 2 auracana hens have 1-1/2 inch areas at the base of their tails with little scabs and broken feathers. The australorp hen is fine--no pecking injuries. The roo is a barred rock. I have not observed whether it is the australorp or the roo doing the pecking. It all seemed to start when the auracanas started to moult, several weeks ago. Does this get better or do I need to separate them?