Rooster bullying one chicken.

[thinkyesi]

I have a year old rooster and 11 chickens. He picks on my sweet cochin. To the point of trying to kill her. Shes very sweet and i dont wanna give her away. But the rooster is being a big jerk to her. But hes a good rooster to all my other girls except my barred rocks and her. What should i do? But he doesnt hurt my barred rocks the same as my sweet cochin.

 

[Percheron chick]

Why do you have a rooster? I would either put him in jail or get rid of him. If he kills the Cochin or you give her away, he will just turn his anger towards the rocks.