This year I got chicks earlier than usual. They are 7 weeks old, fully feathered (I have attached an image for reference), and I am wondering if they can go outside– without a heat source? I am from Minnesota, and our temperatures fluctuate a lot. Some nights it is 23° and others it is 38°. During the day, it’s anywhere from 34° to 60°. With the temperatures fluctuating so much, can I put them outside yet? Or what is a good temperate to go by before putting them inside. TIA!!