I currently have 2 mature laying hens, a red sex-link and buff orpington, who are relatively friendly. They are in a chicken tractor at night and free-roam in my fenced-in backyard during the day. They are relatively chill and mostly just hang out under the deck all day. Next week, 12 baby chicks are shipping. We are also in the construction phase of a larger 4x8 coop with plenty of human standing room and a 5x10 attached pen. That should be completed before the chicks are fully feathered and ready to spend the winter outside with their two older sisters. I'm thinking by November I will want the babies outside; they should be about 10 weeks old by then. I was thinking of putting the newbies in the new coop first and only transitioning my two older birds in with them after the young ones have been in it for like 2 weeks and comfortable in the pen, as well. Since it's in the yard, the older hens will be able to see the younger ones through the pen's fencing even though they will continue to roost in the tractor. I hope that since my two older ladies will be outnumbered and will also be the "new" ones to the coop, that they will be less likely to be mean to the younger ones once I move them all in together. Does this seem like a reasonable strategy? If not, I am up for suggestions. I will keep the tractor on hand in case any bird ever needs to be separated from the main flock.