Expressions of dog wagging tail:

1. The dog’s tail shakes quickly and horizontally, which means that it is actively showing favor to you.

2. Wagging its tail erratically means that the dog is in a good mood.

3. Many dogs will also wag their tails from side to side when they feel scared, and they will do so with their tails between their legs.

4. If the dog swings its tail between its legs, bends its limbs slightly, and lowers its head, it means it has done something wrong.

5. When a dog is ready to enter a fighting state, the dog will also raise its tail high and swing stiffly from side to side.

6. When dogs face unfamiliar people or animals, they will also wag their tails, but the frequency is very low, and some are accompanied by roaring or growling threatening sounds.

7. If a dog’s tail spins very fast and it wants to bite its own tail, it means it is bored.