I have two 7 week old pullets, one EE and one BR. They are SO ready to be outside in the coop, but I had a few questions. Our night *lows* are 46-52 degrees, and will only get warmer. When can I move these two outside FULLTIME without a heat lamp? Their coop is rainproof, draftproof and they are very comfortable in it. I am only worried about the cold. When will they be totally feathered out to withstand most temps? I have pictures as well if needed to see how they have feathered out thusfar. Any advice = helpful. Thanks!