The very first animals that humans domesticated were dogs, thousands of years before farm or pack animals. It’s perhaps not surprising that people and dogs share such a deep connection to this day. You can argue that early dogs served a practical purpose, such as watching out for intruders, keeping other dangerous animals at bay, or assisting in hunting. But today’s dogs? Not so much. Nevertheless, they remain the number one pet.) in the United States. They must be doing something right. A new study, led by Onyoo Yoo from Konkuk University in South Korea, sheds new light on how interacting wit…