Canine parvovirus (CPV) is a highly contagious virus that mainly affects dogs. It is spread from dog to dog by direct or indirect contact with their feces. Unvaccinated dogs and puppies younger than four months old are the most at risk. The virus affects dogs gastrointestinal tracts and is spread by direct dog-to-dog contact and contact with contaminated feces, environments, or people. The virus can also contaminate kennel surfaces, food and water bowls, collars and leashes, and the hands and clothing of people who handle infected dogs. The virus is resistant to heat, cold, humidity, and drying, and can survive in the environment for long periods of time. Symptoms of parvovirus include lethargy, loss of appetite, abdominal pain and bloating, fever or low body temperature, vomiting, and severe, often bloody, diarrhea. Mortality can reach 91% in untreated cases. Treatment often involves veterinary hospitalization, and there is no cure for parvo. However, supportive care can be given to treat symptoms such as vomiting, diarrhea, and dehydration, and to ensure that the puppy gets adequate nutrition. Vaccines can prevent this infection.