I currently have four hens in a tractor by the house. I plan on putting 15 new hens in the barn (about 75 yards away). I will be free ranging both flocks when i'm at home and working outside. Their "home ranges" will probably overlap, but i want to keep the flocks seperate as far as housing goes. Will my "house hens" still go back up to thier tactor by the house or will they follow the crowd into the barn at night?