What's your dog really saying when it wags its tail? According to Italian researchers, dogs not only communicate happiness with a wag, but they also convey anxiety and potential danger.
In a study published Thursday in the journal Current Biology, researchers described an experiment in which they observed the behavior and heart rate of 43 dogs of various breeds as they viewed a projected image of a dog wagging its tail.
When the videotaped dog wagged its tail toward the right side of its body, most of the dogs remained relaxed and calm.
However, when the videotaped dog wagged its tail toward the left side of its...