Then I would not worry about them. If they aren't getting pecked and still are together, they will be fine.They are as integrated as I can get. They are in the same coop at night, same run for food and water, and free range through the day. But no matter where they are, they are separated from each other. Even in the coop, the big girls take the highest roosting bar all together and the little ones are down lower together.
Yay for another vote for pullets!