My 7 month old silkie roo has decided to chase one of my year old hens. She is very healthy and a big girl. My flock consist of one roo and 9 hens. Four hens are his age and five are one year of age. He is kind and gentle with all the hens except this one. He chases her and pens her down stands in fromt of her biting and pecking her face and head. She runs at first with panic but then lays down but he still bites her. She will hide but he hunts her down. If i am outside he will avoid attacking her but i do believe its because she stays by my side now since he has been attacking her. He is good with us the kids, my dogs, and the other hens but he will not let up on my pinkers!! Is there anything i can do to better this situation short of having to rwhome him?