The vomiting of yellow water by dogs with parvovirus is not an aggravation, but a normal clinical reaction of dogs with parvovirus. In addition to vomiting, there will also be symptoms such as diarrhea, lack of energy, loss of appetite, and blood in the stool; the incubation period of parvovirus is about 3 to 5 days. , the onset period is about a week, the first three days are the early stages of the disease, the fourth and fifth days are the most serious, and the dog will start to get better on the sixth and seventh days, so active treatment is required during this period. Help the dog get through it.