Canine parvovirus (CPV) causes a severe, often fatal gastroenteritis in unvaccinated dogs — particularly puppies. It is highly contagious, environmentally persistent, and entirely preventable through vaccination.
Parvovirus causes severe, prolonged suffering. Affected dogs experience profuse bloody diarrhoea, relentless vomiting, extreme weakness, and the misery of systemic illness. Young puppies deteriorate rapidly — dying within 48–72 hours without treatment. Even with intensive hospitalisation including IV fluids, anti-emetics, antibiotics, and nutritional support, recovery takes days of continued suffering before improvement. Many dogs die despite treatment. The welfare tragedy is that parvovirus is entirely preventable with a vaccine that has been available for decades. Dogs in communities with low vaccination rates suffer preventable outbreaks year after year. Ensuring all dogs are vaccinated — particularly those in shelters and low-income communities — is one of the highest-impact welfare interventions available.