Vomiting in dogs is usually accompanied by nausea. Drooling, licking lips, and swallowing excessively are signs of nausea. Sometimes they eat grass. We don’t know exactly why dogs do this, but grass might mix with worms or ingesta to better vomit them up. Or grass might protect the esophagus from sharp objects like bone shards when the dog vomit. Regardless, vomiting is a very active process. The abdominal wall contracts and causes heaving.
There are many causes of these symptoms, some of which are obvious whereas others require testing to diagnose. Please call us to know more about vomiting.