I have a flock of 12 1/4 chickens. I have a silkie roo who is one month younger than my first 4 hens. Of those hens, my barred rock, Pebbles is the top hen. She totally ignore the roo unless he is showing them food. He doesn't even try to dance for her much less mount her. But, if he even looks twice at my feet, she goes after him. She has even gone after him for chasing the dog. Funny, though, when he goes after my EE, or any other chicken, she doesn't care. I figure she thinks of me as her rooster, since she comes running to me and then squates. Personally, I like having a hen that puts the evil roo in his place once in a while. There is never any blood, just humiliation.