My chicks have been outside in their coop for 2 nights now, and they seem fine, except for going into the enclosed upper part of their coop at night. they haven’t been in a fully dark space until yesterday, and they were freaking out. tonight we tried putting a little night light in and they seem to gravitate more towards the upper part of their coop. should we keep the light in or try to adjust them to the dark? the light doesn’t give off heat, but they seem to like it.