Parvovirus in Dogs: Everything You Need to Know

Canine parvovirus (CPV-2) is one of the most feared dog diseases for good reason: it spreads easily, survives in the environment for months, kills unvaccinated puppies at terrifying speed, and requires intensive hospitalisation to treat. Yet it is almost entirely preventable — the vaccine works extremely well.

How Does Parvo Spread?

The virus is shed in the faeces of infected dogs before symptoms appear, and survives in soil, grass, and on surfaces for up to 12 months. You can bring it home on your shoes without knowing. Direct contact between dogs is not required — contaminated environments are the main route.

Symptoms

• Profuse vomiting
• Haemorrhagic diarrhoea — characteristically foul-smelling, dark red to black
• Severe lethargy and weakness
• High fever or hypothermia in shock
• Rapid dehydration

Who Is At Risk?

• Puppies between 6 weeks and 6 months old — most vulnerable
• Any unvaccinated dog regardless of age
• Immunocompromised dogs
• Certain breeds are more severely affected: Rottweilers, Dobermanns, American Pit Bull Terriers

Treatment

There is no antiviral drug for parvo. Treatment is intensive supportive care:

• IV fluids to combat dehydration and electrolyte loss
• Antibiotics to prevent secondary bacteraemia (parvo destroys the intestinal lining, allowing bacteria into the bloodstream)
• Anti-nausea medications, stomach protectants
• Strict isolation to prevent spread
• Nutrition support — tube feeding if necessary

Survival rate with intensive inpatient treatment: 68–92 %. Without treatment or with delayed treatment: very low.

Prevention: Vaccination Schedule

• Core puppy vaccination series at 8, 12, and 16 weeks
• Booster at 1 year
• Then every 1–3 years depending on vaccine type and lifestyle risk
• Until fully vaccinated: avoid unknown dogs, dog parks, and high-traffic outdoor areas

Log your dog's vaccination dates and upcoming boosters in Purzi. A single missed booster can leave a previously protected dog vulnerable — the reminder feature makes sure that doesn't happen accidentally.