Open there door and let them decide what they want to do. I open my coop almost every day except really cold days in winter. Even in winter I go out and shovel about an 8 X 8 area outside, and spread some hay for them to scratch thru. Never forget one day looking out and there was a brave hen who waded thru snow up to her neck to get over to the bird feeders to pick up seeds! I picked her up and carried her back and gave her a good talking to about frozen toes and snow blindness.