There are three reasons for dogs to be in this state: 1. The influence of external weather, 2. Shivering while sleeping, 3. Physical disease leading to repeated convulsions. Because the shivers caused by the first two reasons are not serious, this It is a normal reaction of the dog's body to the outside world. If the body twitches due to disease, the owner needs to pay attention to it and take the dog to a nearby pet hospital for examination in time.