I have a group of chickens that were raised together from 1-2 weeks of age--August till now.. There is one who is always getting his top feathers picked out. We split the group up, gave away one that was doing some picking on the other chickens, but whenever this chicken's top feathers get about an inch long they get pulled out. He has never had top feather. NEVER. I am so frustrated. I do not know who is doing it, maybe it is several. I have tried Blu kote and Vetericyn, That made them pick more. Currently I have him seperated with some small but same age chickens. I am mad, frustrated and feeling like an awful mom. I don't know what else to do but put a helmet on the poor guy! His poor head looks like ground beef. I am just mortified!