In this case, the owner should fast for the dog and keep the dog fed with water during this period. This state of the dog is generally a manifestation of gastrointestinal inflammation. It is recommended to purchase anti-inflammatory drugs for feeding, and then feed the dog a small amount. Light food, watch for a while. If the dog's health improves, there is no serious problem. If the dog vomits repeatedly and does not improve, it should be sent to a pet hospital for treatment in time.