My four week olds have lots of feathers, still have fuzz around their neck. I'm in North Carolina and the temps during the day are in the 80s right now and will drop into the 50s at night. I have them outside right now to play, but I was wondering if I could just leave them there indefinitely now? They have been on reduced heat but have still had a light during the most of the day/night. Today they had some heat lamp, but not directly in their brooder. I know to make sure that they are secure at night. What do you think?