We brought them home in a cat carrier and let them sleep in it in the coop. This morning I let them out and sat with them for a while. Pecking orders are very real things, and Bee is the peckiest. She is the most aggressive with the new chicks, but the little white one, Myrtle, stood her ground pretty well. The other two, Rosemary (gold) and Ethyl (black), are a bit more cowed. Kevin put in a couple more higher perches and they like being up high. Other than being a bit far from the food and water, I like them being up high. My three can get used to the new girls, but not be so intimidated.
I'll be checking on them frequently throughout the day.
Rosemary and Ethel
Addendum: I put the new chicks in the old pen, and it is next to the coop. The new chicks were fine, but the old chicks weren't sharing the food and water very well. Now they can see each other, but they each have their own foods and waters. I'll probably let them be seperated for a while to get used to each other.