We have 4, 4 week old chickens. We have a coop already outside that they spend most of the day in and at night they come to the garage where they have a box and heat light. We've continuously build taller boxes and they keep getting out and roosting on the ladder above their box. My question would be if it's too early to put them in the coop full time? Temps get down to about mid 40's right now. I would definitely put their light outside for them in the coop and turn it on at night.