Well, happy to report, the "who cares?" continued up through this morning and everyone was out on the coop floor with no hostilities at all. One big pullet halfheartedly chased a few of the littles and gave them a warning peck (the one where they clearly have absolutely no intention of making contact) and that was it. Both groups kept to themselves, though I get the feeling the bigs think the littles are part of their group. They don't go very far away from them while the littles are in their outdoor pen anymore. Nearly always within eyesight for 70% of the day or so. The littles explored flying up on things and eating out of the big girl feeders once the bigs went outside for the day and then out they went to their pen. They also clearly already know how to use the coop ramp and door, even though I had the door shut.