1, health problems: Some dogs may show abnormal behaviors due to health problems, such as pain, disease, malnutrition and so on. If you find that the dog's behavior has changed greatly, you can consider taking it to the vet for examination.
2. Emotional problems: Dogs may show abnormal behaviors due to emotional problems, such as separation anxiety, phobia, stress and so on. These emotional problems may come from the dog's environment, experience or social experience and need proper training and treatment.
3. Lack of training: Sometimes dogs may show abnormal behaviors because they have not received enough training, such as learning to control emotions, behave, obey instructions and so on.
4. Dogs need more activities: Some dogs need more exercise and activities, otherwise they may show hyperactivity and anxiety.
You can observe when your dog will behave like this and record it, so as to better understand the root of the problem and take corresponding measures.