My chicks (7 weeks) are spending their first night in the coop! I put them out this afternoon (about 1:00) and have checked on them periodically since. It was pretty warm today, but is now down to about 40 and the last time I checked they were all spread out, sleeping peacefully and trilling/chirping when my flashlight shone in the coop. I'm still a bit nervous and will check on them a few more times this evening and throughout the day tomorrow. They seemed so happy to have the new space. I hope they'll do alright out there. I plan to bring them back in if they seem too cold or stressed and re acclimate them slowly.