What Does It Mean When a Dog Wags Its Tail
The movement of a dog's tail is also a kind of "language," a form of expression.

Husky (detailed introduction)
Although different dog breeds have various tail sizes and shapes, the meanings expressed by their tail movements are generally similar. Schnauzers have relatively short tails, but the meanings they convey are the same as those of other dogs.
1. The specific meaning of a dog wagging its tail Generally, when dogs see their owners and feel happy or excited, they wag their heads and tails. The tail not only swings left and right but also continuously rotates.
In addition, a tail hanging down means danger; a raised tail indicates joy; a tucked tail shows fear; a still tail reveals unease; rapidly wagging a tail horizontally symbolizes friendliness.
2. Tail movements are also related to the owner's tone Tail movements are also related to the owner's tone. If the owner says "bad dog! bad dog!" in a kind voice, the dog will also wag its tail to show happiness.
On the contrary, if the owner says "good dog! good dog!" in a stern voice, the dog will still tuck its tail to show displeasure. In other words, for dogs, human voice is only a sound source, not language.
3. Tail activity is closely related to olfaction and special anal glands Sometimes, tail activity is closely related to olfaction and special anal glands. The anal glands give each dog its unique scent.
An excited dog will wag its tail to spread the scent; a frightened dog will cover its anal glands and stop releasing scent. Overall, the frequency of tail wagging reflects excitement and health: the faster the wag, the more excited and healthy; slower wagging indicates some excitement but poor health.