We find that if you sit with the chicks in the evening before they coop, until they feather, they dont have the tendency to chase or protect. We have been raising them this way for about 5 or 6 years. We have had as many as 40 Buff Orpington in the yard. No rooster problems. Have about 20 hens with 3 roosters at this time.
We try to sit out after dinner until dark if the chores are done in time. About 30 min to watch the sunset and put all the animals to bed. Peaceful to watch all the farm in harmony. Review of my completion of my daily tasks, and start the list for tomorrow, while I enjoy what I worked so hard for.