My chicks are 4 weeks old and THRIVING! I put them out in the coop last week with their Brinsea Ecoglow heat plate. They come out during the day in the small run I made them and they just love going in and out of the coop. I live in Texas and right now it's about 80-85 during the day and temps at night hoover around 53 but may be 60 or it may drop to 45 for a few hours. When can I take the heat plate away?They have loads of feathers. Way more than down. I am getting some baby ducks Thursday and I would love to use the heat plate for them inside. But if I have to I will use a heat lamp and leave the chickens with the heat plate.