So, tonight is the girls' third night in the coop. They all put themselves to bed quite early. We have a freeze warning, and supposed to have some pretty good breezes. Having built in so much wonderful ventilation, that actually might be an issue. Had to make a choice to 1) do nothing, 2) bring them back in the garage, or 3) move the heat lamp out to the coop for the night. Was a bit horrified by talk of roosters loosing their feet to frostbite.
Chose to move the heat lamp out to the coop. Plus, unplugging it is easier than trying to catch the chicks when you're late for work.
The first evening the chicks were out in the coop/run, they had no clue that they were supposed to put themselves to bed. After it got dark I tossed them in and shut the chicken door (got one of the new AdorStore doors). The second night, they were pure comedy. Three of them were perched in the opening blocking the stragglers from getting in. It was like I was watching a chicken version of Red Rover. Check out the video if you want a laugh.