I started with 12 one day old chicks of mutliple breeds last March. From early on, the others picked the tail feathers from the 2 Golden Campines. I had to cull the flock down to 7 pullets and one cockerel due to inadequate space. One of the Campines went to freezer camp. I thought maybe providing them more room in their 6x6 coop would solve the problem. The remaining GC finally started growing back pin feathers, but then I noticed picking again. So, I applied Rooster Booster Pick-No-More to the area last night. It had the opposite effect. When I checked on her late morning, her butt was a bloody mess. I observed two different hens in their outside run pecking at the area. I suspect other too. I don't relish the idea of isolating the GC until she heals, but its not like I can just eliminate the one offender. Is it time to "rehome" the GC so that the others don't develop cannibalistic behavior?