Behaviour
What your dog's tail tells you
Wagging doesn't automatically mean joy. How the height, speed and sweep of the wag show you what's going on inside your dog.
A wagging dog is a happy dog – right? It's not quite that simple. To begin with, wagging only means one thing: your dog is worked up. That can be joy, but also uncertainty or tension. The tail tells you a lot if you look a little closer.
What to look for
Three things give you clues: how high the tail is carried, how fast it wags and how loose the movement is. Roughly speaking: carried high means confident or highly excited. Held low or tucked under means unsure or afraid. A stiff tail shows tension.