These chicks are about 5-6 weeks old, 3 are fully feathered but the RIR is a runt and is still missing some head/neck feathers...our low temp at night is 50-55 degrees, can I kick them out to the coop? I've been putting them in the coop during the day and bringing them back in at night. They were sleeping in a pile when I brought them after dark one night.