Hi, I have 2 EEs almost a year old, and ever since almost 10 months ago they've been extremely bullied. It started out as just a small bald spot on their backs and now they have almost no feathers left on their backs! They almost have no tail feather left either and their butts are quite raw and red looking. I have 6 chickens and they have 60 square feet of run so I don't think it's overcrowding. I've tried putting saddles on them but they manage to rip them off so quickly its pointless. I also recently noticed they have worms if that makes any difference... I haven't noticed feather loss on my other chickens ( 1 cuckoo maran, 1 silkie, 2 orpingtons) except for a few missing feathers on the cuckoo Maran. I cannot figure out who the bully is even though I've been trying for months. I think I'm going to put them in an isolation cage as I can't think of any other options. Any advice?