I'm getting ready to move my 11 Buff Orp and Gold Laced Wyandotte teenage chicks into the coop with my Barred Rock hen, Banty hen, and Polish rooster. The chicks are getting close in size to the Banty. The past few days, the mature hens and rooster have been looking into the brooder run when the mature chickens are out free-ranging, and the chicks have been crowding the fence wall to look out a the mature chickens. The Banty hen, especially, has been exhibiting hostile behavior. When the chicks are face-to-face with her, she will peck at them though the fencing, sending the chicks running for safety. Maybe it's because the chicks are closest to her (the Banty) in size. I always thought she was the mellow one of the three mature chickens. So, is there a good way to introduce the chicks into the mature hens? "Play dates"? Or just shove the chicks in the coop when they're big enough and hope for the best? I want to minimize the stess on both the chicks and the mature chickens.