In the past, when we've moved our chicklets into the Big Girl coop, they (the littles) do the cuddle puddle on the floor for a while. After about a week, The Man and I go in there and start putting them up on the roosts. In about a week, they start roosting with the Big Girls. One year we had a Big Girl bully who wouldn't allow it. We put her in bully jail for three nights, twice, to break her and give her an Attitude Adjustment. After that, all was well. We are getting ready to move another batch of littles into the Group Coop this week.