There are many reasons for dogs to vomit without eating, such as indigestion, gastrointestinal diseases, food poisoning, internal parasites, etc., which can cause this symptom in dogs. When a dog is found to be vomiting, it is necessary to first deprive the dog of food and water, and observe the dog's condition. If the situation is serious, it needs to be sent to the hospital for examination immediately. You need to pay more attention to the dog's diet, do not feed cold and irritating food, and give him regular food. Dogs are dewormed.