The reasons why dogs keep biting their tails:

1. There are bugs on the body. Dogs that have not been dewormed for a long time will often scratch and bite certain parts of their bodies because the bugs are jumping back and forth on their bodies, making them very itchy.

2. Suffering from skin diseases. Some dogs will bite their tails and bleed because they feel itchy and unbearable. This is a sign that the dog has a skin disease.

3. Because it’s too boring. The dog was so bored that no one played with it, so it could only kill time by running in circles and chasing its own tail and biting it.

4. Hereditary issues. Breeds such as German Shepherds and some hounds have a more tail-chasing habit than other dog breeds. Even if they grow up, they still have this habit. It cannot be ruled out that there is a genetic relationship.

5. Attract attention. Sometimes dogs will do this to attract the attention of their owners. When the dog is chasing its tail, you will be amused and you may have to praise it for being so funny. The dog knows he is doing this and the owner is happy.

6. Insufficient nutrition. Dogs have the nutrients they need. When the nutrients they absorb are insufficient, they will bite randomly. Common phenomena include biting their tails, eating grass, and eating their own poop.