BEggRN
Songster
I have used reverse integration as suggested by springvalley123 above. I put my chilliest hen in with a single youngster, and it went fabulously. The hen wasn't thrilled to be separated from her flock but there was no bullying, and after a couple of days they settled in together. When I rejoined them with the flock, she would physically step in between the other hens and the younger singleton when she anticipated any issues. It was an amazingly simple solution