We are working on a broody buster. We are going to put a dog crate in the coop. I read to elevate it and just use a wire bottom crate so air can flow. How high does it have to be though and do you put some wire over the crate bottom so the spaces aren't so large? Is just a few inches off the ground ok? It will be in the teens tonight. Will she stay warm enough by herself? Normally she snuggles up with her pal at night to stay warm. I do not let her out to free range at all, right? She stays in the crate for 3 days/nights with just food and water then I let her out and observe, correct?