Hello I need help! I have 2 young hens and 1 young rooster I am trying to introduce to our older 3 hens. The 1st attempted ended badly where the older hen pecked and wounded the younger rooster. I put them in the run all together after having then in separate runs for 2 weeks. Then after he healed I tried the Separate the run and then went to the free ranging and it seemed ok, at night the young chickens went in there own coop. Once I felt comfortable I put them all in the run together without a separater and then we put them in the coop with the others at night now he has a big gash with blood again! I set them in there after the older ones went to bed. I don't know what else to do except maybe put a divider in the coop. I already did a divider in the run again. The young chickens are about 6 months old. Any suggestions?