I have three young birds (hatched in June) that I need to have merged with my existing birds (8 chickens and a rooster) ASAP. They’ve been in enclosures next to each other since the chicks moved out and we’ve let them out in a run together for weeks. It is okay as long as the newcomers keep to themselves, but the problem is that some of our older birds seem to attack them when they get too close. Not just peck them to show them who’s boss, but as if they could end up killing them unless we broke them apart. They gang up on them and jump on top of them. Weather is getting worse and we need them out of the temporary coop. We’ve merged flocks once before and there was pecking and drama, but it went pretty smoothly all the same. As it is I just can’t see them living in the same house.