I have four 7 week old pullets that I am slowly starting to integrate with my seven 13 week old pullets. I do not have the option of free ranging my chickens, but do have a very secure 8 X 16 foot covered run attached to my coop. I have been placing the 4, seven weekers in the run in a wire dog crate so that they can get to know each other safely. I then let them have some supervised time together (few minutes) before the youngsters go back to the brooder. I have read a ton about integrating these to groups and understand there will be some "normal" pecking order behavior that will work itself out. I just don't know what is normal behavior and what I should worry about. Currently there is a lot of puffing up, growling, some pecking at the youngsters and such that occurs. I haven't left them together long enough for anything serious to happen. I would like to get the youngsters in the coop in the next few weeks. Unfortunately the dog crate doesn't fit in the coop or else I would leave them in that for more extended time. I['m only doing a few hours at a time in the run because it's winter here in wisconsin and I'm also acclimating them to the weather. So how much pecking, bullying, etc should be considered normal? Do my youngsters just need to get bigger?