I have a 2yo cock in with about 10 (need to count them!) hens of different breeds. Although I've not seen who is doing it, they were plucking out the feathers from his neck. Purple spray seemed to have got on top of that and now she/they are taking feathers from the top of his head? No sigh of parasites, he's the only one, they are free range and I've taken alot of pains to see they get enough protein. They are currently on breeder pellets. He's treading and I have a batch of eggs in the incy that are all fertile from his breed. He's a good example of the breed but he looks a mess atm although doesn't appear to be hurt-the skin is not raw etc, just bald.
anything else I can do? I watched them as much as I could at the weekend but didnt see a thing-dusted him with powder just in case.