its gettin hoter and i think they shoulfd be fine at night.....its like in the 60s-70s at night.....and they have a roost and there is 4 of the lil chicks and they all have feathers so shouldnt they generate their own heat and be fine?
38-45 degrees until the last two nights, now it's staying in the upper sixty range, believe me they will be fine:>) At four weeks they can snuggle together for warmth.