I did it. I have two mini flocks - seven bantam ee's age 3 months and five mixed large size girls, age 5 months. Each little flock has her own coop. For two months they have been separated in the big chicken yard by chicken wire, so they were well acquainted thought the mesh. Finally the big day arrived. I spread lots of alfalfa hay all over both sides of the yard to make it all look and feel new, and I scattered their favorite treats everywhere to make it a party. Then in late afternoon I took down the barrier dividing the two halves of the chicken yard. All went very well. The big girls and little girls already seemed to understand the pecking order they had observed from their side of the fence and they were more interested in their treats than in each other. There was no bloodshed, and not even any pecking, not even the loss of one feather! The higher-ups used the stinkeye and lunges to establish their superior status. When it got dark, each little flock went into her own coop. The next morning they came out into the now shared yard and all was well. That, as I understood from this forum, is about as good an outcome as I could have hoped for. And yet, now, weeks later, the little girls and the big girls are clearly two separate flocks sharing one big run. The big girls are the top hens and they chase the little girls away whenever they want to. The little ones respect this and there is plenty of food and water for all. But my question is will they ever be one big flock, mingling together in their yard? I expect they will always go to their own coops to sleep, but will they ever develop friendships with members of the other flock? Or should I just be happy about this toleration of one another?