Hi i am new to the fourm and chicken raising. I have 5 chickens 2 plymouth rocks, 2 buff orphingtons, and 1 red seuxlink. In the past few months my plymouth rocks have started getting bald patches above their tails on their back and chest and bottom. at first i thought the other chickens were pecking them but it seems they may be doing to themselves I have tried putting anticeptic spray and bag balm on them it helped heal the woundes but they still have bald patches. i was woundering if anyone knows whats wrong with them and how to cure it.