I have a hen who has recently been pecked on her lower back and the other girls overnight picked out all of her feathers in that area. Not all of the girls contributed, because I watched in the morning and there are only a few who did it. I culled the ringleader and isolated the injured hen. She healed up well, so I put her back in with the other chickens. It looks like she is having feathers picked again, but this time it is her tail feathers. She is also molting, so I can't tell what it is. I found feathers in her isolation coop, and am still finding feathers now, but a couple of the feathers look like they are being bitten. I can't tell what it is for sure, so I don't know if I should seperate her from the, again. Any help is appreciated!