We are just about finished building the girls a new house. They are 3 months old and have been using the old house since we moved them out of the brooder. So for about 6 wks. My question is how to acclimate them to the new place and get them to go into in instead of the old one. Both are right next to each other. Will it be as simple as closing one door and opening the other and turning the light on in the new one? Or are we in for an adjustment period? They have been putting themselves to bed at night for quite some time. Any advice?