Our chicks were hatched around February 23, making them nearly 3 weeks old. Most of their wing feathers have come in and they have a lot of adult looking feathers already. We have had them in the house in a homemade brooder that had a heat lamp as the heat source. Yesterday we moved them to our small coop and put the heat lamp in there, but I've been reading about the dangers associated with that. My hubs doesn't want to spend any more on another heat source right now, and I want to be very careful about our set up. We have 10 chicks and 5 ducklings in the coop right now. I'm in E Tn and the temp highs are projected to be mid 50's and higher the next couple of weeks. My question is, if my 15 birds are closed in at night in the little coop, will they need a heat source at all? The ducklings and the chicks have been together since the beginning and they all snuggle together the rest of the time anyway.