We're new flock owners. We have 6 beautiful Cinnamon Queen pullets. We've had them for 3 days. They are 18 weeks old. 2 of them have started laying. We're seeing one CQ not letting the others on the roosting bar at night unless we're there to put them on. And then today she appears to not let them in the auto door entrance to the coop. We understand a pecking order needs to be established. About how long does this take? Thanks