We have 3 chickens and are wondering how we can get them to stay up in the coop at night. The funny thing is that they are laying in the nesting box which proves they can and do go up there but for some reason they stay and sleep down in the run at night. We have tried to shut them in the coop overnight but they still don't go up at night. Btw, why do they need to go up any way??? If you have any thoughts on these questions that would be great. Thanks!!!