My four 9-month-old pullets have always slept on the roosts in their small elevated henhouse...until about 4 nights ago. I came home after dark to find the pophole to their house had been closed (probably by my 3-year-old), so they had been shut out of their house and were huddled in the wood chips in their tiny attached run. I opened the pophole door, expecting them to make a beeline up the ramp into the house, but no dice. They were fully awake, just looking at me...I figured they'd go in when they were ready, so I went to bed after locking the run door. Next AM I discovered they had never been in--no poop on the house floor. Fine. Maybe they were comfy where they were. However, they have slept on the ground in the run ever since (for the last 3 nights), even though the pophole has been open. What gives? Did they just suddenly decide they liked sleeping outside better? The weather here has been extremely warm for March (between 75-80 degrees during the day), but the house is well ventilated. It is tiny, however, and as such did keep them warm during the freezing winter temps, but are they just too large to be comfortable in there now? Do they enjoy the breeze? There are two roosts and two nestboxes inside, so it's cozy but not suffocating. I find it hard to believe that it's mites, but I've seen ants in the yard already, so who knows. They were raised together from chickhood, so they've slept in a fluffy pile before and seemed content, so should I just not worry? They are safe in the mini-run from any predators we might have. Sorry for the lengthy description, but it's just WEIRD. Any thoughts? Thanks!