Opinions please! I have a RIR who has systematically plucked out her neck feathers over the past 4 months. It started when she got into a fight with another bird. There was no injury other than a feather or two yanked. Since that time, she has worked the area up and down so now she has a bald patch on the lower neck to the chest about 3-4 inches down and 1 inch across. I have looked the area over many times. There are no parasites, skin problems, cuts, etc., that I can see. After I applied pinetar to the remaining feathers around the area a couple weeks ago, she stepped up operations and cleaned those out too! I never see anyone peck her (she's 2nd in charge), and I really think she has been doing this to herself. Anyone have any suggestions on how to get this to stop? Is this common? Is there a parasite I don't know about here? I realize the feathers probably won't grow back until a molt. THANKS for any advice!