I built a hen house and run. house is 5x4. run is 12x8. chickens get to free range part of the day. I inherited a young friendly rooster that just started crowing. I then added two young hens, not yet laying and an older 2 year old hen. the older hen started going after one of the younger hens, not too bad but noticeable. then added 2 young but laying hens. the older hen redirected her aggression to one of the new hens and the same new hen being bullied by the old hen began picking on the hen previously bullied by the old hen. the rooster has joined in on bullying the young hen also. I know there are pecking orders but im worried one or more of the hens will be seriously injured. Advice, what to do? this is my first go around with chickens, all info will be appreciated. they are on lots of scraps, trimmings and mixed scratch.