Is there perches in side the coop? I did not at first in mine and they would sleep under it on the 2x4 used for support. If so then it might be that a few extra windows with wire over them to keep them safe will help.In the future I may plan on leaving it open all the time. But they’ve only been out there a few weeks so I’d like to give it time to see what predators may try to get in overnight, if any at all, just so that before I do leave the pop door open all night I’ll have a better idea as to what I may need to make more secure or change. My enclosure has yet to be tested by any predators, at least from what I can tell. So I’m still a little leery about something trying to get into the run overnight. And I’m a little OCD/paranoid still with being a new chicken owner. Yeah, I know something could happen at any given time. Tonight, tomorrow night, next year. But I’m giving the presence of my chickens being here time to sit and see what critters I may attract and just how secure my set up is. I have an acre yard. Neighbors on all sides except the back and it’s not fenced in. However, what was once a horse pasture behind us, which is closer to my coop as it sits on the backside of my yard, they’ve fenced off and are building a huge house there. So I’m also thinking that once the house gets finished and the owners move in, that perhaps their presence will help keep any critters away that may have previously crossed that vacant lot to get to my yard. I’ve seen foxes, coyotes, trapped a opossum and a coon, as well as the occasional stray dog. So they’re here.