I have 9 hens that live in small cages and each cage has a bossy gal (not mean but she is the boss). When I let a hen out to roam around while I clean she always goes to another cage and picks a fight through the cage. In a few days (fingers crossed) all the hens will get to go live in the coop and play on the run. Is there a good way to put all my hens together without having chicken battles?