First of all, the dog needs to be fasted to avoid aggravating the vomiting condition. Secondly, the dog needs to be fed an appropriate amount of antiemetic and antidiarrheal medicine to prevent the dog from continuing to vomit and have diarrhea, which may lead to dehydration, which may be life-threatening in severe cases. Finally, determine the specific cause of the dog's vomiting and diarrhea, and then select targeted drugs for treatment. In addition, dogs with severe vomiting and diarrhea require infusion during treatment to provide energy to the body and maintain electrolyte balance in the body.