We all know that happy dogs wag their tail; but is there more to it?
There IS a difference between a relaxed, “half mast” wag and a stiff, pointing straight-up wag. The former is good and indicative of a friendly dog; while the latter is bad and indicative of a tense, possibly dominate and potentially aggressive dog.
Latest scientific research seems to point that the tail-wag is even more intricate then we thought.
The tail-wag to the left seems to signal to other dogs that “I’m friendly and safe to approach”, while a tail-wag leaning to the right seems to signal that “I’m tense and potentially unfriendly”. Here is the original article http://www.dailymail.co.uk/sciencetech/article-1247380/The-tell-tail-clue-happy-dog--wag-left.html
This is just another in a long line of evidence that dogs use sophisticated body-language to communicate with one another as well as with unsuspecting humans. Can you imagine what's going though a dog's mind after he bites a human? The dog is probably thinking “man, I clearly indicated to that silly human that I’m not comfortable with his approach, why did he have to try and touch me? Silly humans”.
