Our 5 week old chicks have grown accustomed to staying outdoors in their little outdoor run/coop during the daytime hours, all day. We've been bringing them in at night up to this point. We have brought them in initially because it got cooler at night. That's not the case anymore. It's warm enough now. We've got a rubbermaid filled with pine shavings (tipped on its side) in the run and we also have a darker/more protected area up on the ladder/roost for them. As dusk approaches they basically become frantic and start peeping. They huddle together near the corner closest to the "opening/gate" of the run. They don't even consider the "safer" spots we have created in the coop/run. Their peeps of fear make it hard to leave them out there, but we are determined to let them stay out tonight. It's warm enough. The coop/run is safe enough (I hope!). I'll report back in the morning...who wants to take bets on how much sleep I actually get tonight?