I am happy to tell you that all 4 pullets are roosting inside the coop together. I introduced my new two pullets to the existing two by putting an old coop next to the new one for 4 days. The first two days no access to each other. The third day I opened up the runs to connect them and there was more of an avoidance of each other than anything else. Day 4 pecking order was being established. Day 5 closed off the old coop and put all the girls into the new coop that evening, but left the door open into the run. The two new girls roosted in the door for 3 nights. Last night and tonight they are all inside the coop on the roost together. They still seem to move in two man groups in and out of the coop but I have not seen any real pecking or bullying going on since day 4. They live side by side now peacefully and I hope that they bond well soon. I love that we have 4 chickens. One for each of us people, and each a different breed of chicken. This makes learning about chickens interesting for my kids to learn the things about theirs that are different from the others.
Now to move the new coop to center stage and start planning the garden around it.