I have 9 birds in my little flock. 6 are 18 weeks old and consist of one Rooster and 5 hens. One is 9 weeks old and 2 are unknown because I got them from a farm. My guess is around 12 weeks. The older ones were all raised together and the younger 3 were introduced. Things are just fine in the coop at night and during the day the older birds usually go out of the coop and run to free range. When they are gone, the other 3 roam the coop and pen, occasionally going out into the yard. The problem is when they are confined to the coop and pen, the 3 younger ones won't get off of the perch. In another week, I will be out of town for a few days and due to other family member schedules, they may all be in the coop and pen for most of the day. How long will the younger 3 sit up there? Will they eventually get hungry or thirsty enough to attempt to come down? They get chased by a couple of the older birds but so far, no injuries. I had hoped they would work it out by now. Hoping for some suggestions. Maybe I'm worrying about it too much and if I just let it go, they will figure it out.