Parvovirus can be detected even before the disease occurs. You can use parvo test paper or blood test to find out whether your dog is infected with parvovirus. It is best to send it to a pet hospital for examination, so that the results will be more professional and accurate. The incubation period of microorganisms is generally 3 to 5 days, and then the disease will enter the onset stage, with symptoms such as vomiting and diarrhea, poor energy, not eating or drinking, and severe cases of blood in the stool. Once discovered, timely treatment is required to avoid life-threatening consequences.