Canine parvovirus is a contagious virus that attacks a dog’s gut and immune system, and vets are warning of a surge, with puppies under six months hit hardest. The earliest signs are lethargy, loss of appetite, vomiting, and bloody, foul-smelling diarrhea. Call your vet immediately if you see them — early treatment saves lives, and vaccination is the only protection.
This guide explains what parvovirus in dogs looks like, why vets are raising the alarm right now, and the simple steps that keep your dog safe.
What is canine parvovirus? Canine parvovirus (often just called parvo) is a highly contagious virus that attacks a dog’s gastrointestinal tract and white blood cells. It spreads through infected feces or contaminated surfaces — a shared water bowl, a park path, even shoes or paws — and it survives for months on surfaces, so a dog need not meet a sick dog to catch it.
Why are vets warning about parvovirus right now?
On November 1, 2026, vets in the Riverina region of New South Wales warned that parvovirus cases are climbing through Leeton, surrounding villages, and Griffith. Dr. Amritha Lala Alayil of Griffith Veterinary Hospital told The Area News that most recent cases were puppies under six months old, all exposed before they were vaccinated.
RSPCA Victoria reported dogs testing positive in the Buloke and Benalla shires in September, and the Griffith clinic has even treated 10-year-old dogs. Vets say risk rises in spring, when more people are out with their pets. Senior veterinary nurse Hayley Bull of MiVet Leeton urges owners to act now: parvo is heartbreaking, but largely preventable.
The surge is in Australia, but the lesson is universal: parvo hits hardest where vaccination lapses, and it moves fast once it arrives.
What are the signs of parvovirus in dogs?
Early signs can be easy to miss. The first clues are usually lethargy and a loss of appetite, typically followed by vomiting and severe diarrhea that is often bloody and very foul-smelling. Vets in the current outbreak report that around 80 percent of cases involve vomiting, lethargy, and bloody diarrhea. The AKC also lists fever, weakness, weight loss, dehydration, and depression.
The frightening part is the speed: as Dr. Alayil warned, an animal can deteriorate overnight, and a dog can become seriously unwell within a day or two. One recent case needed around a week in hospital on fluids. If you notice any of these signs, call your vet straight away — and let the clinic know before you arrive so staff can keep other patients safe.
Which dogs are most at risk?
Puppies between six weeks and six months are the most likely to get parvo, the AKC says, because their immune systems are still developing and vaccination may not be finished. Any unvaccinated dog is at risk, and older dogs are not immune if their boosters have lapsed — the Griffith clinic’s 10-year-old patients prove the point.
How is parvovirus treated?
There is no drug that kills the parvovirus itself, so treatment is supportive care in a veterinary hospital: intravenous fluids to fight dehydration, medication to control vomiting, and antibiotics to prevent secondary infections while the immune system recovers. The AKC notes that most dogs who survive the first three to four days are likely to make a complete recovery, usually within about a week.
Hospital care can run for days, which is why costs vary so much from case to case. BlueTarg’s free Dog Wellness Planner helps you map out routine care — and talking to your vet about a savings buffer before an emergency is always smart.
How can I protect my dog from parvovirus?
- Check vaccination records today. Puppies usually have their first parvo dose at six to eight weeks, followed by boosters, then yearly boosters. If you are not sure when your dog’s last booster was, call your vet.
- Keep young puppies home until fully protected. Vets generally advise waiting two weeks after the third puppy dose before taking a puppy out in public or letting them mix with other puppies. Until then, skip dog parks, beaches, and pet shops.
- Skip shared water bowls. Bring your own bowl on walks, and avoid communal bowls in public places.
- Make sure visiting dogs are vaccinated too. If friends bring their dogs over, their pets’ vaccination status matters as much as your own dog’s.
- Ask for proof before bringing a puppy home. Whether adopting or buying, ask for vaccination records first — and check them against your vet’s advice.
- Clean carefully after a sick dog. Parvovirus survives for months on surfaces, so ask your vet which disinfectants actually kill it and how to clean bowls, crates, and yards after an exposure.
What should I do if I think my dog has parvovirus?
Do not wait and see. Call your veterinarian immediately, describe the symptoms, and follow their instructions about bringing your dog in. Warn the clinic in advance so they can isolate your dog from other patients. Keep your dog away from other dogs, do not try to diagnose or treat at home, and bring vaccination records to the visit. With parvovirus, hours matter — the dogs that get help early are the ones most likely to pull through.
Frequently asked questions
Can a vaccinated dog still get parvovirus?
It is uncommon, but possible. A small percentage of dogs do not develop full protective immunity even after vaccination, and protection can wane if boosters lapse. Vaccination still dramatically lowers the risk — it remains the single best protection available.
Can humans catch parvovirus from dogs?
No. Canine parvovirus is specific to dogs and does not infect people. The human parvovirus (B19) that causes fifth disease in children is a different virus and is not spread by dogs.
How long does parvovirus survive in the environment?
Parvovirus is extremely hardy and can survive for months on surfaces such as soil, bowls, crates, and floors, resisting many common cleaners — another reason vaccination and hygiene matter.
How long is a dog with parvovirus contagious?
Dogs can start shedding the virus before they show symptoms, and they may keep shedding it for some time after recovery. Your vet can advise when it is safe for your dog to mix with other dogs again — do not guess, and keep a recovering dog isolated until you have that guidance.
How much does parvovirus treatment cost?
Costs vary widely with how sick the dog is and how many days of hospital care are needed. RSPCA Victoria points out that vaccinating costs significantly less than treating the disease.
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Sources: Lifestyle News, November 1, 2026 (reporting The Area News, Griffith Veterinary Hospital, MiVet Leeton, RSPCA Victoria); American Kennel Club parvo guide. General information only, not veterinary advice — if your dog shows these signs, contact your vet immediately.