I've recently moved my young pullets/chicks from the brooder to the coop with the rest of the big girls. All of the full grown hens are fine except for one 4 year old barred rock who will charge at them and then separate out one of the pullets, whom she will chase for what appears to be entertainment. This only occurs in the chicken run and not when the girls are free ranging as the pullets make sure to steer clear of the aggressive hen whenever they can. The pullets are around 8 weeks old and have been sleeping outside for the past two weeks. In order to transition the pullets to the coop, I resorted to removing the aggressive hen from the flock when they go into the coop in the evening and having her sleep in a separate area. However, if I attempt to introduce both the older aggressive hen and the pullets in the same area, she will consistently terrorize them and attempt to attack them. Any advice for how should I handle this situation as the pullets must be able to live outside with the rest of the grown hens.