I haven't seen her pulling her own feathers out. The flock had mites or lice back in late spring early summer. I individually dusted each one, I dusted their house and made a put dust in where they dust bathe. Since then I have dusted regular and have seen no signs of mites or lice. She is the only one that is acting sick and with out feathers. They all molted thru out most of the latter part of the summer. Last night as I was trying to get a dog crate fixed to put her in so I could give her some antibiotic water/ sugar water, I had run a little silkie that has been broody for over a month now (no eggs) off the nest. I was out of the lot maybe 10minutes and came back, the silkie was floating in a bucket of cold water. She was completely lifeless, no movement. I grab her out and realized she was jerking uncontrolably. She had probably been in the water for 5-10minute. Her eyes were fixed and almost closed. I wrapped her in a towel and took her in the house. I put her in the bath tub and got the hair dryer out to dry her off and warm her up. The entire time she was jerking uncontrolably unable to sit up because her leggs were like they were froze stiff. After I got her dried off I let the hair dryer just blow on her on low heat low fan for a few. I put her in a open front box and placed her in front of the gas heater. I got a glass jar and put hot water in it. I propped her up on the bottle which was under a towel to try to warm her underside. Thirty minutes had passed by this time and she was still like she was unconcious and jerking. I thought she was a goner. I had a few things to do outside so when I can back in after about and hour she was standing up and wasn't impressed at all that she was in the house. I offered her some warm medicated water and she drank some. I put her back outside in the hutch with another silkie with a heat lamp on her and she started eating like crazy and drinking like crazy and was fine. I was so scared because I thought she was dieing. After all of that the chicken that I was going to try to doctor had gone to roost so I will have to deal with her today. Thanks Everyone for your input.