Study shows that dogs may wag their tails to please people. They could have unconsciously contributed to the selection over the years.
Dog tail wagging is rhythmic – rhythms make people happy. The research can shed light on what people thought thousands of years ago, according to researcher Andrea Ravignani, a co-author of the study. The authors said more research is needed to confirm their theories, but they hope to study dogs' heart rates and other vital signs to understand what the animals are thinking.