Have a turken roo that has taken a dislike to our hen that broods. She is a black star. The first time she sat he would go after her when she was off the nest so I kept him from her. This time when she went back to the flock he literally pecked all the skin off the top of her head. I cleaned her up and medicated the area just about the time she was healing she went into his yard and my husband found him just attacking her horribly. We have two coops and he meanders back and forth between the two, since the attack he is on lock down. I brought her in and had to butterfly a portion of her scalp and put gauze over the half there was not skin to work with. We do not understand why he has decided to pick on her since he was fine until she starting to sit on eggs. Any ideas?