How Bad Is Roundworm In Dogs?

How Bad Is Roundworm In Dogs? Roundworm larvae can migrate to the lungs and cause coughing and other respiratory symptoms, sometimes even serious conditions such as pneumonia. Vomiting or diarrhea. Roundworms can cause digestive upsets such as vomiting and diarrhea. Diarrhea can range from mild to severe. Can roundworms in dogs be fatal? Usually spread