Hi everyone, I'm a little concerned about our chicken behavior and wondering if anyone has any idea what's going on. Our chickens are a year and half old and have been living in the same coop and attached run since they were babies. They've always spent all their time in the run, even sitting out there when it's snowing out. Their coop has a door into the run that's always open, so they can go back and forth as they please. This past week they have been in the coop all day every day. I open the door and they're all just standing there on the floor, doing nothing. I've been letting them out to free range in our fenced yard every day since they were babies, and for the past week when I open the door, only a few of them come out and the rest stay in the coop. The ones that do come out don't venture away from the patio. I did find lice on a few of our birds last week and treated them with DE, as well as putting a new bin in their coop with sand and DE for dusting whenever they like. Could this be causing this change in behavior? I can't imagine why it would matter, but it's the only thing that has changed in the last week. I can't imagine what's going on. My only other thought is that maybe there's a predator hanging around outside the run that has them spooked. Does anyone have any clue what could be causing this? It's no emergency, I just think any significant change in their behavior must have a reason. Thanks in advance for any responses.