My 3 roosters have got big bald areas on the sides of their necks where a hen (as yet unknown) is pulling out their long neck feathers (hackles), and eating them. What can I do to stop this, and why is it happening? I noticed it on the white rooster first, so I put him in a cage to re grow the feathers thinking the other roosters did this to him. While he was in there the other 2 roosters have been plucked on their necks. The roosters are not fighting......I am sure its a hen. I sat and watched them for a hour yesterday and today, and can not seen which one is doing it!!! The white rooster was re growing his feathers nicely.......they looked like hedgehog spikes growing. But he got out of his cage and in the morning the feathers had gone again!!!!