I have 5 week old Dominique chicks. They are practically fully feathered, aside from some stray baby feathers hanging on. I have been keeping them inside due to the weather here in middle TN. I was wondering if it would be safe to put them in the outside run with a heat lamp. It looks like during the day will be 45-60 degrees and night will get to 20-40 degrees. I don't mind keeping them inside but I can tell they are itching to be outside! Thanks!