I have a flock of 7 hens. my oldest girls are a 3 year old BR and a 18 month old brown leghorn (bantam). 3 months ago I merged 5 - 8 week old pullets. They did fine no blood but the big girls did chase the little girls and the two groups hung apart for most of the last 3 months. They are now starting to at least come for treats together and occasionally range together. from the beginning I had to block off the nest box because one of the pullets was trying to sleep in there. Now that the pullets are beginning to lay I have opened up the nest boxes again. However, the welsummer is going back to sleeping in the nest box and now I realize it is because the leghorn is picking on her. She picks on the others too but they just put up with it. How do I break the leghorn so the welsummer will roost with the rest of the flock?