I have two buff Orpingtons and two Rhodebars all are 5 to 6 weeks old. I built a new coop with a heat source inside and nice enclosed run outside. I moved them to the new coop yesterday. My coop is quiet roomy but there are no windows. I've been told that I should leave them in their new coop at least two weeks before letting them outside. The temps are in the 30's at night and mid 50's during the day . Can I leave the coop door open so they can come and go or do I really need to leave them locked up for two weeks? I'm thinking that since I have no windows in the coop that the continuous darkness won't be good for them...any suggestions?