My 5 hens and 3 roosters(accident) come down from the roost inside the hen house and into the run a daylight. But in the last 2 weeks they have begun to go back into the roost several times a day. If I go out there, they will come down. Most days they are put out into the yard and never venture over to the roost. The girls haven't started laying so that isn't the problem. I am hoping it is a sign that they are close to laying. Any ideas?