Roo Trying To Breed with A silkie Roo

[freemare]

So I just got a new rooster. I have him living now with the rest of the flock. I have 13 chickens, I have 3 roosters, one silkie one silver laced roo and the new guy who is a white cochin. I am not sure what is up but the cochin male has started to try to breed my silkie roo. Does anyone know what this is? Any ideas? Any ways to stop it?

 

[aart]

It domination, not sex.
Separate the males.