We starting to integrate the chicks with the older hens. We fenced off a section about 6′ x 6′ with just chicken wire so the hens and chicks could see each other. After a week or so we took the fence down and made a opening to the brooding area (really a dog kennel) that only chicks could get through so they could get protection if they feel they needed it. After a day or so everybody appeared to be able to get along.