We decided we couldn't wait on our 3 babies (just now 20 weeks old) bantams to start laying eggs so we added 4 full grown (~1 yr old) large laying hens. We brought them home Friday night and put them in the run. There was some squawking but the banties were a bit intimidated by the shear size of the new girls and the new girls were shy in their new home. The pecking order was established quickly the next morning with Tiny, my smallest bantam, pushing the largest new girl off the perch. They don't quite flock together yet as one bantie will have nothing to do with the big girls. So my poor rooster runs back and forth between the two groups trying to herd them together.