So, we have one (10 wk) cockerel and 4 (10 wk old) pullets, that we inherited from my son's kindergarten class as week old hatch-lings. They live in their coop and stay in their run. Because we have a cockerel, I thought it would be good to add more pullets while everyone is still young and make the ratios better for him. So, on Monday, we added 6 pullets (18 wks old.) We built a playpen area inside the coop so they could all live together without touching. and they just all stared at each other every day. Today it was so hot that we thought we would try to open the door of the playpen and see what happened. 2 of the 6 new hens ventured out and tried to be brave, but that cockerel just just chasing them, bullying them, and being really nasty. Twice, he went into the playpen area and made all 6 new hens huddle in a corner in fear. What should we do? Is there a better way to introduce everyone? We just locked the 6 back into their playpen so they can get some stressfree sleep and were thinking of trying again tomorrow. But any suggestions on the right way to do this? The 5 we had were black and brown sex link type chickens, and the 6 new ones are barred rock. Please educate this newbie chicken wrangler! I'm clearly doing it wrong!