We added our pullets into our existing flock today, after a month of living in adjoining runs. So far, so good! The older girls seem fairly disinterested in them, with only an occasional peck. We put our two guinea hens into the smaller area now, because I still don't trust them to play nice. I'll give them another few days, and then add them in one at a time so they can't gang up on anyone.
But the pullets are totally confused! Especially trying to sort out where to go at bedtime! They'll figure it out after a few days, but right now it's both sad and funny. One cream legbar is still refusing to roost even though it's completely dark. She keeps crying and trying to break back into the smaller section with the guineas. I hope she settles down eventually.