HawaiiCoyote
Poultry Thief
They do flock, but they are mean as hellBreed is something to consider, if the OP is living somewhere feral chickens tend to roam. Not something I would have considered, as we have no wild chickens, especially game or jungle types where I'm at. If that's the case, I can't even begin to guess how to integrate those varieties or whether they even flock or not.