We integrated pretty successfully a group of 3 chicks with a flock of 4 grown hens. We did the slow intro through the fence, then supervised visits, then the night all the chicks hopped up into the coop for the night we figured we were good. Except the hen at the bottom of the 'big girl' pecking order is harassing/pecking at the chicks. Since they free range in the backyard all day it isn't awful - she'll chase them away from treats but they get their share when she moves off. But at night, she's going after them on the roost. I went to check on them tonight and when I looked in, she knocked one of the little girls right off the roost! We got home after dark so I was out locking everyone up and one of the little ones wasn't even in the coop - she gets picked on the most by the one hen that I think she decided she wasn't even going to try. That one usually ends up in a nest box or on the floor but tonight she was on a railing on the deck (complete panic attack when I couldn't find her in the coop). My husband added on to the current roost (it's a 2 x 4) which even without the addition is plenty of room for all 7 of them. The chicks are currently nearly 12 weeks old and about 2/3 the size of our grown hens so it isn't like they are tiny babies but this one hen (and the others pretty much ignore the little ones) is just obnoxious. We can't supervise all the time but is this normal? Will it stop when the babies get to be grown? I have actually moved her on the roost to the opposite end of where the chicks are which does seem to help but I don't want to have to keep doing this forever. Any ideas or suggestions would be appreciated.