My one RIR female used to mate other females, and I asked on here about it. Seems it is fairly normal in a flock without a rooster. I now have a rooster, he is 16 or 17 weeks old and is mating nearly all the hens.... well, when they don't chase him off or peck him on the head This morning, I saw one of my Buff Orpingtons mating another hen. She stayed on her for some time... grabbed her by the neck, the whole nine yards. For those of you with roosters, do you see that behavior with your hens?