Last night when the 3-12 week old chicks were heading in for the night, the rooster and one hen decided to go into the big coop with the other chickens instead of their little coop. One hen was not ready and stayed by herself in the small coop. The 2 stayed right inside the door but wouldn't come out. I was worried but they are pretty big now and have been free ranging together for a few weeks now. Got up this morning and everybody is just wandering around in the coop together, no fighting going on!