They have been out with the big birds since they escaped in the sun room. There seems to be enough room for all the birds. The big birds leave the little ones alone for the most part. Like when the littles find the perfect spot for a dust bath. Then the big birds come over and run them off. It took a few weeks for the barred rock to adjust to the flock, and now they are besties. The little ones biggest problem now is waiting a minute of two for the bigs to roost and then they go in the coop. If they try and go in too soon, the run them off.