This situation may be caused by the dog being hungry for a long time, suffering from viral diseases, or suffering from pancreatitis. First of all, if the dog is hungry for a long time, the dog will vomit yellow gastric juice due to excessive gastric acid secretion. Therefore, it is recommended that the owner give the dog regular and quantitative food. Secondly, when dogs are infected with viruses such as canine parvovirus, they will vomit yellow liquid and have diarrhea. It is recommended to use antiviral drugs for treatment. Finally, dogs suffering from pancreatitis will also have the above symptoms, so they should consult a doctor in time for anti-inflammatory and repair treatment.