why do reindeer run in circles

Reindeer run in circles for a variety of reasons, both practical and instinctual. On the practical side, reindeer need to keep their bodies warm and active in the cold Arctic climate. Circling around keeps their muscles warm and helps prevent frostbite. Reindeer also have a deep sense of community and family, and circling around is a way to keep the herd close and bond together. It's a way to keep each other safe and protected, and it's a way to show love and support for one another.