I've looked in the forums, and could've missed this particular behavior problem, so forgive me if this has been asked a million times before. I have 13 chickens, all hens. One from a previous flock (she's like 7 years old), 12 we got all together last summer. They are happy country chickens, and all of them started laying in January. Well, as soon as they started laying, one particular RIR has gotten aggressive towards me. She is perfectly fine with the rest of the flock, doesn't chase cats (like one of my Barred Rocks does!), and is laying. But she has almost drawn blood several times already. Sometimes, I have attributed it to the pants I'm wearing with patterns/spots. But I can be wearing jeans, and she goes for my hands and arms, too. I googled it once, and read that I should pick her up or turn her upside down. I've tried both ways. When I reach for her - after she bites me and clings on to me like a tick - she submits. Spreads her wings & squats. I'll carry her all over the yard under my arm for several minutes. I've gently laid her on her back on the ground and held her there for 30 seconds to a minute. Nothing seems to be working. She runs up to me like all the others do, but you can tell she gets closer & kind of bobs her head like a boxer waiting for a good shot. I don't have anyone to take her, and I don't have it in me to cull her myself. Any suggestions?