We have four buffs, one americauna and one bantum. The americauna has always been picked on. At first it was blood, and we'd seperate, heal and then reintroduce. Recently it was feather plucking so we removed her completely. Now, the buffs are getting feather plucked...except the plucker. I couldn't tell them apart so I used some blue cote to mark the "evil" one. I've been watching and she's the one plucking from the others (except the bantum). One buff's whole bottom is bare poor thing. So, I thought I'd seperate the mean one and try americauna back with the flock but no...the other buff's are plucking from americauna even without the mean one. Americauna is just the low bird on the pole. So I seperated americauna again and put the plucker back with the flock. Anyway...what can I do to discourage this feather plucking? I initially tried putting pine tar on but the plucking continued. They are laying eggs so I don't think they are too stressed out, but who knows? They are about six months old. Thank you so much!