Looking at them, I would say they are definently fully feathered, EE's and Turkens. But my little chickies are only 6 weeks old and it's supposed to freeze tonight and possibly snow/sleet on Sunday morning. They've been without a heat lamp now for about 4 nights, it did get down to 39 last night and they are all just fine. Should I add a heat lamp for the freeze and snow? They have a big insulated dog house (with deep shavings) in their pen until they are big enough to go to the coop with the big girls. It is on the south side of the garage so the wind is totally blocked.