I am in good spirits, not accompanied by loss of appetite, diarrhea, inactivity, etc. There should be no serious problems. The possible reasons are: eating too much, eating too fast after being hungry for a long time, eating spoiled food, and the weather is cool If the dog catches cold and other reasons, the breeder can give it gastrointestinal relief medicine. If your dog vomits yellow water and is accompanied by other symptoms, it may be food poisoning or internal disease, and it must be sent to the doctor for treatment in time.