So we have an interesting flock composition and we've been trying to get our 2 younger chicks to integrate with the other 4 for about 4 days now. None are adults technically most were gotten from a feed store at older than just hatched so ages are approximate. We have: Black Australorp @ 15 weeks (She was the only one to survive a dog attack and essentially raised the other three) 2 black sex links @ 11 weeks A barred rock (easily the smallest) @ 9 weeks And the new ones, two EEs @ 6 weeks old They all have been allowed to see one another occasionally from the very beginning (smaller chicks being given outings to the yard while the others were free ranging) The older pullets were always aggressive towards the EEs and there were some really vicious attacks very early on (we originally had 5 EEs but are down to two after giving the others away). We have one relatively small coop with a run and a medium sized fenced yard. We tried the put the chicks on the roost at night trick for two nights in a row. They were left alone on the roost but the minute we brought them down with the others, chasing and pecking began I even observed a few pecks on the roost itself. Though not overly vicious it was almost impossible for the chicks to get away in the small coop. So I put the chicks in their own cage inside the run in the morning for a few hours for a couple of days before I let them all out to free range in the yard. Together in the yard there is more chasing though less pecking because the chicks can get away pretty easily. The last 3 days or so they've been hiding under the deck during much of the day (though I have been careful to make sure they have access to food and water. They will also come out and munch on our tasty clover and they seem to be getting braver every day. The older group will generally leave them alone as long as they are a good distance away (though still within sight). The chicks have for the last two nights been roosting on their own on the bar a level down from the older crew. They almost cooped themselves last night but were a little confused as to how to get back in. This morning though it seems there was chasing and pecking the moment they got off the roosts. I let them out because it was very clear it was going to get ugly staying in the run and there was a big chase/peck fest on the top of the deck which continued until the chicks hid themselves underneath. The main culprit of the chasing and pecking is the barred rock. But once she gets into it in full swing she will draw the BSLs and sometimes even our docile australorp into the action (though this is fairly rare). I'm beginning to wonder if this is ever going to work itself out. They are fine enough in the same yard together but the older group won't tolerate the younger ones being close to them at all unless they are roosted or sleeping. I was considering separating the barred rock from the others for a while but I'm not sure that will help. She is quite friendly with humans but so vicious with the little ones! The chicks will not fight back at all though the two will chest bump with one another a bit when the others are not around. Any advice? Just keep waiting? Here are some shots of the young ladies in question . . . The smarter of the two EEs, Jasmine. The not as smart and foolishly brazen, Goldilocks. The Bully of the four older pullets, Shanah. She's in my husband's hands so you can tell her size just a bit.