Hi - my name is Karen from Washington) I am new to raising chickens and I have 5 pullets - one is a barred rock and she has turned extremely mean. Whenever I put my hand in the pen, she comes running and pecks me - has drawn blood twice. She even leaps into the air to try to peck me. All the pullets are about 4 1/2 months old. Is there anything I can do about this. She "WAS" my favorite, but not anymore!!!! Thanks.