My 7 month old pullets started feather picking each other when the snow started falling and they were cooped up in their coop for a few weeks. They get laying pellets, and a cup of scratch daily. When I noticed the feather picking, I started increasing their protein by feeding them scrambled eggs and BOSS everyday, and cat food a couple of times a week. I also just added AviaCharge 2000 today. I have been applying Vicks Vapo Rub which seems to be helping some, and I also started using Rooster Booster Pick No More Lotion today. No blood drawn, just major picked feathers on two of the 9. I shovel their run a bit to encourage them to go outside on nicer days, I've hung cabbages, and sprinkle the BOSS in the shavings for them to scratch around in. I don't think they are crowded - 9 pullets in a 7X7 coop plus an additional area for nesting boxes and 2 large roosts, plus a 20X20 outside run. I've included a couple of pictures of the worst one. I haven't noticed any of the others pecking her - I've watched her and she is pecking herself. Her butt is bare and now she has moved to her legs. I don't have any light on them, I've checked for mites and lice and don't see any, and she scrambles for food like the rest so her appetite is fine. Her poop is normal as well. Any other suggestions I should try? I'm afraid I'm going to find her frozen to death due to lack of feather coverage.