Need some advice.. I have have had 5 RIR's for about 9 months, since hatching and I recently added some new members to the flock. Of the new members the two smallest are being bullied. At feeding time one of the others will chase them away when they come near the food and they aren't going in the hen house at night and have chosen a high perch in the barn. The others have gradually joined inside the coop at night. What steps should I take? Right now I am feeding them separately after feeding time. I have tried to intervene in the chasing away but another one continues it. My 5 RIRs are extremely friendly, can hold easily and I haven't had any issues with behavior until now. Thanks!