Glad to find this thread. I've got a bad case of the "integrating blues" here! I was given 2 "meat" hens by mistake and they now take up most of the space in our brooder which was supposed to accommodate the 6 new chicks we got. I turned them all out into the coop last night and this morning all six were in a nesting box together with the two fat ones on top! That was fine, but by the time I took the kids to school and got back, our 6 one year old girls had drew blood from one of the cornish (?) hens and had terrorized everyone else. Right now I've put the babies in the coop (everyone was done laying for the day) and left the older ones out in the run. It's really frustrating because if I had just been given the right chicks in the first place, this wouldn't be an issue right now. But all six of them are not fitting in that brooder anymore! Guess I'll be doing as suggested and partitioning off part of the run for the babies, I just hope it doesn't take months for them to become accustomed to each other!! As for the two fat ones, we still haven't decided what to do about them..