Hi all! I'm raising my first 10 chickies and have a question for you all. We moved the chicks to their outside coop 4 days ago. I bought them at a feed store and think they are 7-8 weeks old. Ive had them almost 7 weeks. Most have all their feathers but a few have a tiny bit of baby down sticking out of their heads. The coop is 4x5 and 4ft tall with good ventilation. I have 2 heat lamps hanging as the temps dropped here from 60's to 30 yesterday with snow. Ugggg. Is it safe to open their door to their outdoor enclosure? It's a heavy steel enclosure with a top and canvas cover. They would be able to go in coop under heat if they wanted. I dont want to chill anyone . Thanks