So my 5 birds have been moved into their coop and run for a little over a month. I had read that they needed to stay solely in their coop for the first couple days to a week to learn where their home was and make it easier to get them to go back inside at night. I would've kept them in their longer, but there was a heatwave after the 3rd day and it was cooler outside than in their coop and I had read 3 days should be fine. However they haven't been going in their coop at night on their own. Every night I have to pick them each up and place them in their coop. Some of them cooperate but the others run around and do not wanna go in. Is this normal? Is there any way to get them all to go in voluntarily?