I have an unknown breed rooster who up until recently has actually been picked on by all the hens. Here lately all of the hens have fallen in line to his leadership, but there is one hen that I swear he is going to kill. He ripped open the top of her head. That has since healed up and is regrowing feathers. (I seperated her from him of course!)This morning, while I was tending to everyone, he got out of his pen and got into her seperate pen (they were next to each other..i was hoping to be able to put everyone back together so I kept them within sight of each other) and he immediately started to attack her! I had to grab him and throw him back in his pen. Why is he so aggressive to her, and do you think I will ever be able to put her back with everyone else??