I am seriously considering putting these chickies outside on saturday into the coop for good.they are feathered out, except for a very few down feathers sticking out on the back of their necks. they have been without any supplemental head for a week and a half, and as of today are 5 weeks and 2 days old. any reason why they should continue to stay inside in my brooder? attached are pictures of the chicks as well as the forecast for my area. should I wait or pull the trigger?