Even "hatched and raised together" pullets/hens, good friends, are no longer friendly, and are often truly aggressive, after one has been broody, sets and hatches chicks, raises them, and then is returned to her group after weaning the babies. They treat her as a stranger and for me, it means another pen for her--and maybe a trial one hen added from her earlier pen. That may not work either. Robbie is so right--she may never be accepted back. We have to work it out--think like an upset hen??? Good luck.