Hello, My 1yr 3month old lavender amaracauna rooster that I raised from a baby has suddenly started attacking one of my 13 hens. She is a perfectly healthy brahma hen that he has been with since he was little. One day after work we discover her bleeding from the back of her neck in their 100×200 fenced in area. We thought somethinf tried to get her and failed so we put her inside another 12x12 area that has a coop within the main coops run so she would be able to heal but still be near the flock so they wouldnt forget her. After a few weeks she healed so we let her out with the other. Right away the rooster came over, she squated and he mated her. Then he just kept chasing her and each time she would squat he would just stand there pecking the same spot she had her injury before. Her wound was completely healed and the featherd had grown back enough to look normal so idk why he was doing it? He was pecking her so hard she began to bleed again so I again seperated her to let her heal. It was a small little wound so it again healed within a few weeks. Again I let her out and he did the same thing except he chased her till the point she was to tired to run and as she squatted down being submissive to him he started pecking at her head, eyes and even jumped in the air trying to spur her. I quickly shooed him away and put her back in the pen with one of my docile hens to keep her company but idk what to do or whats going on. Why is he all the sudden attacking just her?