I have a small flock of 5 australorps in my backyard coop. I have had them for about 4 months now and got them just before they started laying. They have all gotten along pretty well, until about a week and a half ago. They free range during the day, and I started noticing that one of my hens was hiding under their house when I would let them out. Another has all of the feathers picked off the top of her head, and scabs on her comb. I have one hen, who we call Rooster, who seems to be the dominant. She has grown long tail feathers, crows, and in general acts more like a rooster than the rest of them. I have been watching them closely since I noticed the changes in the others behavior and found that she is running off the one, and constantly mounting the other and ripping her feathers out while she is at it. I understand that one of the hens will become dominant if their isn't a rooster present, but is there something that I can do to prevent the dissention in the ranks and damage to my other hens?