Get Real: Heartworm Prevention


Last Updated on January 19, 2026 by Will Falconer, DVM

Get Real: Heartworm Prevention

Is Your Dog Healthier the Longer You Use Your HW Prevention?

Ever hear this wry, thought provoking phrase?

A headache is not an aspirin deficiency!”

The same common sense thinking could be applied to your dog resisting heartworm. You know, the scary-as_ed worm poised to invade your dog’s inner chambers.

The one in the drug ads that looks like a wad of spaghetti. The one that you swear you’ll never, ever allow in your dog, no way no how.

Well, just like those people who remain free of headaches, those dogs living parasite free aren’t all on monthly pesticides.

I know because their owners and I give congratulatory high fives as their yearly tests come in negative, year after year.

Have you ever wondered how wolves and coyotes survive as a species with no one dropping heartworm prevention bait to them?

They are close genetically to your dog, the wolf especially so. 99% gene overlap.

Fundamental questions arise when you frame your own dog’s health against that wild cousin model:

  • Was your dog born broken? Incomplete in some way?

  • Is she only made “whole” with the addition of a monthly heartworm pill?

And, the more important one, for those of you who are truly seeking to raise the most vital, wildly healthy dogs possible:

Is your dog getting healthier or less healthy the longer you use your heartworm prevention?”

Reality of Heartworm Drugs

You have to understand something about the heartworm drugs to really get clear on the answers to these questions.

The way the usual drugs “prevent” heartworm is by killing heartworm larvae.

Where is the killing happening?

In your dog’s blood stream.

What do you call a substance that kills those we deem problematic?

We call them pesticides.

They are poisons, let’s just be blunt.

Pests include fleas, mosquitoes, heartworms, cockroaches, and whole host of others.

I suspect you’d think twice before you took internal chemicals that kill pests to prevent you from being bothered, am I right?

Something about that thought just intuitively sends up signals of

Wrong. Danger. Warning.

And yet, in our current world, where we’re surrounded by advertising poised to divide you into camps of “good pet owner” and “irresponsible pet owner,” you may be buying that very idea for your dog.

Unless you give your dog a monthly poison pill, you know which camp you’re relegated to.

Or, at least that’s where Big Pharma would like you to believe you live if you don’t comply: The Shame Camp.

And, just to give you a taste of what their agenda is, in 2016, in the U.S. alone, nearly $15B was spent on pet supplies and OTC meds.

The Rx meds and services of Dr. WhiteCoat accounted for $16B more.

So, are they all acting in your dog’s best interests, or is something else at play?

Stark Contrast

There are now hundreds of my patients and pack member’s dogs who’ve been resisting heartworm for decades.

Without resorting to oral pesticides. Or topical ones.

Or (shudder) injectable ones that continue killing larvae in the blood for six months.

They are getting real heartworm prevention. The healthy natural kind.

These dogs live where heartworm lives.

Texas, Hawaii, Florida, you name the place and there are some there who are building natural resistance, month after month, year after year.

And when they test each Spring, the heartworm results come back negative. Year after year.

They’ve been achieving this with my drug free heartworm protocol.

The most significant thing in the dogs on this protocol is this:

These dogs are getting healthier the longer they use this protocol.

Can you say the same for your dog?

Can you even imagine that’s reality for some poor animal getting treated with pesticides for multiple months of the year?

It’s kind of a crazy idea, isn’t it?

Giving more pesticides = growing healthier?

Heartworm Awareness Month

As April comes to a close, and you’re making your plans for heartworm testing (I encourage it yearly) and prevention going forward, I’d like to invite you to step out of the risky drug prevention realm.

It’s good to be aware of the common side effects of these drugs:

  • vomiting

  • depression/lethargy

  • itching

  • hives

  • diarrhea

  • loss of appetite

  • skin congestion

  • staggering

  • convulsions

  • drooling

  • weakness

  • trembling/shaking

(I wish I was making this up, but it’s from the fine print on the popular monthly poisons that Big Pharma is pushing.)

And, we’ve known for decades that autoimmune disease has been associated with these drugs.

It could happen with any dose. First or 50th.

This kind of disease, “immune confusion” as I often call it, is far more dangerous than a parasite would ever be to your dog, no matter where it sets up housekeeping.

When you dog’s immune system starts attacking her own red blood cells and/or platelets, you’re looking at ER time, huge expense, and an estimated 50% chance of survival.

I’d like to invite you instead to give my drug free program a try for this next year.

Join the hundreds of others who’ve been using my protocol successfully and seeing their dogs actually get healthier the longer they are on it.

Grab a Fresh Start on Vital Health

To help you make this wise decision, I’ve put my ebook, “Vital Animals Don’t Get Heartworms! The Drug-Free Prevention Program That Works” and its audiobook version up for sale.

Here’s where you can read more and grab either the ebook or audiobook or both.

Take this opportunity to drop the risky drugs and make your dog naturally resistant to heartworm.

And next Spring, send my your negative HW test results so we can do a high five!

I believe Vital Animals can change the world

One shiny, well-balanced individual at a time.


It all starts with you, the wise animal caregiver, and the health choices you make for the animals in your care.

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