While they are BOTH my flocks, I can't figure out why one rooster is going way out of his territory to hit on the other hens. I didn't even realize he was doing this until I hatched some eggs from my purebred Ameraucana flock. The chicks are stamped with his comb type and they don't have beards. There are four roosters to defend the Ameraucana flock (two of them are silkies) and I can't believe that neither one of them will drive off this invading rooster. They don't eat together or hang out together and they have their own housing. It has to be a hit and run thing because I never see him near the other flock. I guess they only way to stop this is to keep one flock penned up.