I have 5 buff Orpingtons and 5 RI reds, the buffs are constantly pecking feathers off of the reds. All but one red look awful, one is missing feathers on her neck but most have bare butts. We have tried blue kote, pick no more, pine tar, and chicken saddles. Nothing has worked. Everytime new feathers start growing in, they are pecked off. They don't peck until they bleed, just peck feathers off. But their skin is red and irritated. Has anyone tried duct tape? I don't want to do more damage but can't think of any other way to stop this behavior. Any suggestions???