My 11 month old Silver-laced Wyandotte has been pecking herself. She was hiding the spot under her wing and then she started on her back. None of the other birds (3 Isa Brown hens and 1 Silver-laced Wyandotte Rooster) show any signs of pecking because of mites or lice. I use the deep litter method in the coop. I clean the poop from under the perch everyday. They feed at will. I am at a loss as to how to stop her. She is eating and drinking and laying as often as the others. I do give them scratch and meal worms daily. They don't seem to eat much of the corn. The the wild rabits and ground squirrels eat it in the evening and in morning before the chickens get up. She now has three wounds one under her wing (approx 1 1/2" in diameter) and all around the vent. You cant see any of the wounds without picking her up and moving feathers. We have painted her with Dr. Naylor's blue stuff. Its not working. She continues to pick at herself. Again none of the other birds are showing any signs of this. We live in Norhtern Michigan and we have had about 5 or 6 weeks where the hens were either locked up in coop because of storms or they refused to come out because the snow was too deep. Again, all the hens are laying and none of the others show any of the signs. Suggestions????