The reason why a dog’s mouth keeps chewing on empty space

If there is nothing in the dog’s mouth, but the dog keeps chewing, it is a symptom of canine distemper. This behavior of empty chewing belongs to the dog’s nervous system. There is a problem; it may also be because the dog is suffering from epilepsy or the temporary sexual behavior of parasites. It is recommended that owners seek medical treatment in time once they find that their dog exhibits this behavior, so as to avoid missing the best treatment for canine distemper. Healing period.