Hello, We recently put our 5 1/2 week old chicks outside during the day in their coop and my husband thinks that it is warm enough for them to stay outside through the night but I disagree. So I need an expert opinion. The chicks are fully feathered (we have 4). In Florida at night it has been around 62 degrees. The coop has a covered box with straw in it. Thanks for any advice.