what causes parvo in dogs symptoms
What Causes Parvo in Dogs? Parvo is caused through contact with the infection itself, usually through an infected animalâs stool. Parvo is most common in stray unvaccinated dogs, especially those living in unsanitary urban areas. What Are The Symptoms? Once the infection enters the body, it typically takes between three days and a week for symptoms to arise. The infection moves quickly, attacking the intestinal tract and cells throughout the body. Here are some of the main symptoms of parvovirus: