The MSPCA-Angell is urging pet owners to vaccinate their dogs against Parvovirus after three Golden Retriever puppies, all under six months old, were found by Boston Animal Control in the Geneva Avenue area of Dorchester on Aug. 23. The puppies tested positive for Parvovirus. According to CBS News Boston, two of the three puppies had to be hospitalized for six days for treatment. "No one has stepped forward to claim the dogs, so considering all of the circumstances, we believe they were abandoned." Understanding ParvovirusAccording to the American Veterinary Medical Association, Parvovirus attacks dogs' white blood cells and gastrointestinal system, causing symptoms like vomiting, diarrhea, tiredness, and loss of appetite.