We usually lock them up about an hour after dark, as I have a few that like to roam the run for just a bit longer. The other night we shut them up and then I looked and found the 2 littlest ones not in the coop. They too were huddled together in the run just shivering and quiet in the corner. Now I count them every time I go out there. It sure is easier in the morning when they are going outside. LOL
