If a dog vomits despite not eating, you need to first understand the cause and then treat it accordingly. It is usually caused by gastrointestinal disease, internal parasites or viral infection. It is best to send it to the hospital for examination to confirm the cause. Dogs should be dewormed regularly, and their diet should be as light as possible. Do not feed your dog raw, cold or hard food, such as raw meat, bones, etc., which can easily cause gastrointestinal diseases.