Benefits outweigh risks of the Parvo vaccine

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Benefits outweigh risks of the Parvo vaccine

Updated Dec 8, 2024

Dear Cathy, 

My son recently bought a three-month-old Boston Terrier named Riley, who is now receiving all of his necessary vaccinations. My son has been advised the next vaccination will be for the parvovirus, but because of the side effects he’s heard and read about, he is clearly leaning toward not getting this shot for Riley. Understanding how deadly this parvovirus is, is he making the right decision to forgo this shot?

— Jeanne Treanor, Smithtown, NY

Dear Jeanne,

Don’t let your son forgo this vaccination for Riley. Parvovirus is a very deadly virus that chiefly affects a dog’s intestinal tract, which results in vomiting and dehydrating diarrhea. If a dog does somehow survive this horrible ordeal, the virus can damage his or her heart muscle permanently, resulting in life-long cardiac problems.

Puppies and young dogs are the most vulnerable to this disease. It’s a highly-resistant and highly-contagious virus that can live in an environment for many months and can even survive on inanimate objects, like clothes, carpet, shoes, and food bowls. In fact, many animal shelters will not adopt a puppy or young dog into a home that has had a dog with parvovirus over the past year, even if the new dog has been vaccinated.

Most side effects from the vaccination are temporary and clear up after a few days. Ask your son to discuss his concerns with the vet who can ease his worries and discuss with him the benefits of this much-needed vaccine. 

Cathy M. Rosenthal is a longtime animal advocate, author, columnist and pet expert who has more than 25 years in the animal welfare field. Send your pet questions, stories and tips to moc.tidnuptepobfsctd-f9f26@yhtac. Please include your name, city, and state. You can follow her @cathymrosenthal

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Cathy Rosenthal (aka The Pet Pundit), CHES, CFE

Animal Welfare Communications Strategist, Writer & Educator

Cathy M. Rosenthal is an award-winning humane educator and author, animal welfare strategist, pet columnist, and speaker who has spent more than 38 years working in animal welfare with local and national humane organizations. She helps people better understand and care for animals through her nationally syndicated My Pet World column and has been the longtime pet columnist for the San Antonio Express-News since 2003.

In addition to her writing, Cathy develops humane education, leadership, customer service, and compassion fatigue training programs for animal welfare organizations nationwide, and has helped raise millions of dollars through grant writing, strategic communications, and program development.

Cathy is the editor and curator of Humane Perspectives: Leadership in Animal Welfare and is the author of several books, including Grant Writing Boot Camp for Animal AdvocatesThe Lucky Tale of Two Dogs, and The Happy Tale of Two Cats, which was the 2026 winner of the Association of Professional Humane Educators’ (APHE) "Educator’s Choice Award" for Best Humane Education Book for Young Children. She also received the 2026 APHE Nathania Gartman Heroes Award for Impact in Humane Education. Her humane education programs in Texas have reached more than 45,000 elementary school children since 2019.

She resides in Texas with her husband, their cat Sterling, and a former community cat, Maddie, who successfully negotiated an indoor living arrangement but still considers human affection highly negotiable.

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