I have 1 roo and 5 hens. This group has been together for 2 years with no problems. They are in a 4 x 8 coop with a 8 x 20 run attached. We let them out during the day almost every day. I noticed yesterday while I was outside with them, my roo attacking one particular hen. This is not mating behavior. He is standing in front of her pecking only her head, and spuring her. I had a hard time separating them yesterday and I think he pecked out her eye. I didn't want to mess with it too much but at the very least she can't open the eye. I put her in the coop by herself and he just paces the perimeter of the coop still trying to get at her. The other hens are not picking on her and she is so scared she won't even move. She just hides her head in a corner. I made him sleep outside the coop last night so he couldn't get to her. I tried again today and he still is trying to get at her. He will not attack her while I am carrying her but he follows me waiting for me to put her down. He is usually a little rough while mating but nothing drastic. For the most part he is a great roo. He is not aggressive to me, my husband, or our 5 year old daughter, but he does protect them well. I am not sure what to do with him. We really like him but I can't have him killing my hens either. Plus if I do re-home him or have soup for dinner, I may end up with a worse problem with a new rooster. My plan right now is to keep her separate, maybe with a friend, until she heals. Then I suppose I'll try again. Does this sound reasonable? Does anyone have any other suggestions?