
Heartworm Prevention Myths That Could Cost Your Pet’s Life
04/08/25 • 37 min
Heartworm Truths Every Pet Owner Needs to Hear with Dr. Zoo
💔 Heartworm disease is slow, painful, and entirely preventable. So why are pets still dying from it?
In this essential episode of Muddy Paws and Hairballs, Dr. Zoo shares two real-life cases that hit hard: a young German Shepherd in kidney failure at just two years old after his owners stopped prevention, and a rescue terrier whose heart was invaded by worms—leaving euthanasia as the only humane option.
🐾 Here’s what every pet parent needs to understand: Just one mosquito bite can inject microscopic heartworm larvae into your pet. These larvae quietly develop over six months before they’re even detectable—and by the time that lingering cough appears, the damage is often already done.
Adult heartworms don’t just affect the heart. They send offspring into the bloodstream, damaging lungs, liver, and kidneys. And many early signs—like coughing after drinking water—are easy to overlook.
Dr. Zoo also busts the most common heartworm myths:
- “My pet lives indoors.”
- “We don’t have mosquitoes here.”
- “It’s winter—they’re safe now.”
- “I use natural remedies.”
Spoiler: None of these provide real protection. If a mosquito can get inside your house, it can reach your pet—and no natural product has been proven to prevent heartworm infection.
💸 Prevention is simple and affordable: around $5–$7 a month.
💔 Treatment is complex and expensive: $1,000–$6,000+, multiple medications, painful injections, and strict cage rest for weeks. Even after treatment, many pets live with permanent heart damage.
👉 Whether it’s a monthly chewable, a topical, or an injection, heartworm prevention isn’t optional—it’s critical. Dr. Zoo walks us through what heartworms r
Comment on this episode! For questions or if you need a reply- please email us at [email protected]
Quick Update: We’re taking a short break and will be back with a batch of fresh episodes starting August 10!
In the meantime, binge your way through 100+ past episodes packed with pet-saving sanity—and maybe even solve that one issue that's driving you (and your pet) nuts.
Catch up, take notes, and we’ll see you soon!
✅ Subscribe for real talk and expert advice on pet care.
✅ Share this episode to help more pet parents navigate life with their pets. Listen & Follow:
🌍 Official Site | 📱 Facebook | 📺 YouTube | 🍏 Apple | 🎵 Spotify
📩 Contact: [email protected]
Muddy Paws and Hairballs- Your go-to show for dog training, cat enrichment, pet adoption, and behavior help. From puppy tips to managing dog anxiety, we’ve got real talk and expert advice to help you raise happy, healthy pets. Check out all our episodes!
Shopping helps support the show!
Heartworm Truths Every Pet Owner Needs to Hear with Dr. Zoo
💔 Heartworm disease is slow, painful, and entirely preventable. So why are pets still dying from it?
In this essential episode of Muddy Paws and Hairballs, Dr. Zoo shares two real-life cases that hit hard: a young German Shepherd in kidney failure at just two years old after his owners stopped prevention, and a rescue terrier whose heart was invaded by worms—leaving euthanasia as the only humane option.
🐾 Here’s what every pet parent needs to understand: Just one mosquito bite can inject microscopic heartworm larvae into your pet. These larvae quietly develop over six months before they’re even detectable—and by the time that lingering cough appears, the damage is often already done.
Adult heartworms don’t just affect the heart. They send offspring into the bloodstream, damaging lungs, liver, and kidneys. And many early signs—like coughing after drinking water—are easy to overlook.
Dr. Zoo also busts the most common heartworm myths:
- “My pet lives indoors.”
- “We don’t have mosquitoes here.”
- “It’s winter—they’re safe now.”
- “I use natural remedies.”
Spoiler: None of these provide real protection. If a mosquito can get inside your house, it can reach your pet—and no natural product has been proven to prevent heartworm infection.
💸 Prevention is simple and affordable: around $5–$7 a month.
💔 Treatment is complex and expensive: $1,000–$6,000+, multiple medications, painful injections, and strict cage rest for weeks. Even after treatment, many pets live with permanent heart damage.
👉 Whether it’s a monthly chewable, a topical, or an injection, heartworm prevention isn’t optional—it’s critical. Dr. Zoo walks us through what heartworms r
Comment on this episode! For questions or if you need a reply- please email us at [email protected]
Quick Update: We’re taking a short break and will be back with a batch of fresh episodes starting August 10!
In the meantime, binge your way through 100+ past episodes packed with pet-saving sanity—and maybe even solve that one issue that's driving you (and your pet) nuts.
Catch up, take notes, and we’ll see you soon!
✅ Subscribe for real talk and expert advice on pet care.
✅ Share this episode to help more pet parents navigate life with their pets. Listen & Follow:
🌍 Official Site | 📱 Facebook | 📺 YouTube | 🍏 Apple | 🎵 Spotify
📩 Contact: [email protected]
Muddy Paws and Hairballs- Your go-to show for dog training, cat enrichment, pet adoption, and behavior help. From puppy tips to managing dog anxiety, we’ve got real talk and expert advice to help you raise happy, healthy pets. Check out all our episodes!
Shopping helps support the show!
Previous Episode

Feeding Pets, Supporting Families: How PAWSitive Pantry is Fighting Pet Hunger
What if feeding your pet meant you couldn’t feed yourself? For thousands of struggling families, that’s reality—and it’s driving heartbreaking surrenders. But one organization is changing the game.
In this episode, Amy Castro talks with Stacey LeBaron, founder of PAWSitive Pantry and host of The Community Cats Podcast, about how her team is tackling pet food insecurity—and helping pets stay in the homes where they’re loved.
You’ll hear about:
• A nonprofit that distributes 140,000+ lbs of pet food annually
• How food access prevents shelter surrenders and supports vet care
• The real reasons people give up their pets—and how to stop it
• Starting local: how to create change in your own community
• Practical tips for partnering with shelters, food banks & volunteers
Resources Mentioned:
- PAWSitive Pantry
- Mel Robbins' Let Them Theory
- Pet Food Assistance Directory
- The Community Cats Podcast
- Merrimack River Feline Rescue Society
- Animal Policy Group
- Community Cat Calculator
- Community Cat Pyramid
Listen now and learn how to help pets and families stay together—because no one should have to choose between feeding themselves or feeding their pet.
Comment on this episode! For questions or if you need a reply- please email us at [email protected]
Quick Update: We’re taking a short break and will be back with a batch of fresh episodes starting August 10!
In the meantime, binge your way through 100+ past episodes packed with pet-saving sanity—and maybe even solve that one issue that's driving you (and your pet) nuts.
Catch up, take notes, and we’ll see you soon!
✅ Subscribe for real talk and expert advice on pet care.
✅ Share this episode to help more pet parents navigate life with their pets. Listen & Follow:
🌍 Official Site | 📱 Facebook | 📺 YouTube | 🍏 Apple | 🎵 Spotify
📩 Contact: [email protected]
Muddy Paws and Hairballs- Your go-to show for dog training, cat enrichment, pet adoption, and behavior help. From puppy tips to managing dog anxiety, we’ve got real talk and expert advice to help you raise happy, healthy pets. Check out all our episodes!
Shopping helps support the show!
Next Episode

The Day Rescue Broke Me: A Hard Truth About Helping Too Much
I broke down in the middle of a hurricane—sobbing, soaked, and desperately trying to keep my barn from blowing away—while sick kittens cried in a barely-secured shed. That’s when I realized: something had to change.
In this raw, no-holds-barred solo episode, I share the story kept quiet for too long—the mental, emotional, and physical toll of being "the yes person" in animal rescue for far too long.
With over 4,000 animals fostered, a 7-acre property turned full-blown sanctuary, and a rescue organization I’ve poured my soul into, I finally hit my limit. From losing my husband to COVID, to battling cancer while still saving animals, to holding things together through Hurricane Beryl, I’ve lived the reality behind the glossy social media posts—and it nearly destroyed me.
This episode covers:
- Why saying yes to every animal can mean saying no to the ones you could save
- The emotional damage of euthanasia decisions and the savior complex in rescue culture
- The moment I knew my passion had become a compulsion
- Why I'm not leaving rescue, but stepping back to lead with clarity
- How I’m building a leaner, foster-based model focused on advocacy and sustainability
- A preview of my upcoming interview on why the no-kill movement is failing—and what ethical, SMART sheltering could look like
It's time for a new chapter—for me, and for the rescue world—one rooted in balance, boundaries, and better outcomes for everyone.
📢 If you’re a rescuer teetering on the edge of burnout, consider this episode your permission to pause, exhale, and reimagine how you serve animals without losing yourself. And if you’re someone who loves animals but isn’t in the rescue world, this is your h
Comment on this episode! For questions or if you need a reply- please email us at [email protected]
Quick Update: We’re taking a short break and will be back with a batch of fresh episodes starting August 10!
In the meantime, binge your way through 100+ past episodes packed with pet-saving sanity—and maybe even solve that one issue that's driving you (and your pet) nuts.
Catch up, take notes, and we’ll see you soon!
✅ Subscribe for real talk and expert advice on pet care.
✅ Share this episode to help more pet parents navigate life with their pets. Listen & Follow:
🌍 Official Site | 📱 Facebook | 📺 YouTube | 🍏 Apple | 🎵 Spotify
📩 Contact: [email protected]
Muddy Paws and Hairballs- Your go-to show for dog training, cat enrichment, pet adoption, and behavior help. From puppy tips to managing dog anxiety, we’ve got real talk and expert advice to help you raise happy, healthy pets. Check out all our episodes!
Shopping helps support the show!
Muddy Paws and Hairballs - Heartworm Prevention Myths That Could Cost Your Pet’s Life
Transcript
I've heard all the excuses he never missed a dose ,
Amy Castrowe never see mosquitoes ,
Amy CastroI thought my dog was safe because he's an indoor dog .
Amy CastroAnd then comes the heartbreak A pet who didn't have to die but did .
Amy CastroIf you like this episode you’ll love
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