Our original flock is 5 chickens, 2 cockerels & 3 pullets, they are 15 weeks old. We figured that wasn't a good ratio for the girls, so we ordered 6 more pullets. They are 7 weeks old. After about a week of being in adjoining runs, they could see & hear each other, but not get to each other, we tried an introduction over the weekend. The biggest cockerel went right after the babies, chasing & pecking them. He was put in the adjoining run for a time out and the other cockerel took over chasing & pecking, so he went in time out for a bit. When the boys were gone the girls pretty much left the babies alone. We tried again and at one point all 5 were chasing the 6 babies. We then separated both groups again since I had to leave and I didn't want to leave them unattended. We have one coop and it is only accessible from one run, so we have been letting the babies stay outside in their separate runs and bringing them in at night. My questions is, is it better to let the 2 groups have short, monitored interactions on a daily basis or should I just wait a week or so until the babies are a little bigger and try again? Just for reference the 2 runs are 32'x11' and 24'x8' and they are separated by a gate we can open/close. There are lots of things for the babies to hide behind and jump up on.