Canine parvovirus causes severe, painful illness and kills many unvaccinated dogs, yet is almost entirely preventable through vaccination.
Canine parvovirus causes intense and prolonged suffering in affected dogs. The hemorrhagic gastroenteritis produces profuse bloody diarrhea and vomiting accompanied by severe abdominal pain, lethargy, and refusal to eat or drink. Without treatment, dehydration and bacterial septicemia cause death within days, often after significant suffering. Even with intensive treatment, survival is not guaranteed, and survival requires days of hospitalization including painful IV catheterization and interventions. The welfare tragedy of parvovirus is that it is largely preventable - vaccination is highly effective and inexpensive relative to treatment costs. Yet parvovirus outbreaks continue in unvaccinated populations, reflecting gaps in preventive care access and education. Every unvaccinated puppy who contracts parvovirus represents a preventable welfare failure.