Devorah
Songster
You mean a box on the floor? I’m in Mass where the temps are now consistently 70s during the day and 50’s at night. I’m thinking of transitioning my almost 6-week old chicks to the coop soon (they’re practically bursting out of the brooder) and was also thinking about warmth at night.Hello and welcome to BYC!Glad you joined.
They should be fine but I would put a huddle box in a draft free corner of the coop.
Alternatively, you can brood them directly in the coop with a brooder plate for their heat source. Just make the front legs of it higher than the back legs and drape an old towel over it to further trap heat and make it cave like.