Hey guys I currently have 5 chicks that are 3 weeks and 1 day old, and I need to know when is it ok for me to let them stay outside in the coop (with no heat lamp) full time? I live in the Piedmont of NC and currently the temp is about 72 during the day and around 50 at night, however one day next week it is supposed to get down to 40...is it still too cold?