Our chickens free range during the day and they always go back in there coop at sundown. Except once, when a couple of them went into the neighbor's yard and weren't able to figure out how to get back around the fence...but hubby went over and brought them home. Also, a couple nights ago he didn't do a head count when he shut the chicken coop at night and one was left out all night. Luckily she was fine, I went out in the morning to find her running around the yard. Tonight he went to shut the coop and can't find two of the hens anywhere....?? We do have some predators around here but we've never lost a chicken yet. And a couple weeks ago hubby totally forgot to shut the coop and everyone was accounted for in the AM, so if the local predators were aware of the chickens I would think they would have gotten some that night. I think the hubby is about to be fired from chicken coop duties, lol. So assuming my chickens haven't been eaten by a raccoon, fox, coyote or something tonight, why would they not go into their coop?? Could they just be lost in the yard or do they sometimes like sleeping outside?? Ugh, I hope they come back. And I hope this doesn't turn into a habit because sooner or later the predators will find them!! I'll go out again and look for them before bed. Otherwise I hope they show up in the morning!!