I hatch all of my chicks. When I first put them in a grow-out coop and pen I shut them in with food and water for a few days then I open the pop doors. They are a little apprehensive about going out of the coop at first but then get used to it. I feed them in the evening and they go in to eat. There is a light on in the coop. At first I use feed pans. They get into the habit and I rarely have to round them up to get them in the coop. Eventually I switch over to hanging feeders and keep it full of feed. They go in their coop like clockwork. I do shut the pop doors at night even though I have electric wire around the coop and pen. Several months ago around the same time my Gladys was killed by the fox, I had a Rhode Island White pullet and a White Leghorn cockerel both killed with only piles of feathers outside of the pen and coop. I didn't close the pop doors and my best guess is either a fox or coyote got the gate opened. The predator killed the two birds and knocked down the post next to the gate with the electric wire on it. It may have gotten shocked or would have killed more birds. It was kind of foggy that night so I didn't get the breach on camera. I wired the gates shut and something had again tried to open the gate but didn't succeed the following night. It was foggy again that night so no pictures of the gates. I did get pictures of a coyote and a fox checking it out now and then.