What Every Pet Owner Should Know About Heartworm Disease
Posted on April 8, 2025 by Pinnacle Staff
Protect Your Pets from a Silent Threat
Heartworm disease is one of the most dangerous—and preventable—threats to your pet’s health. With April recognized as Heartworm Awareness Month, Pinnacle Vet Clinic is dedicated to educating pet owners about the risks, symptoms, and how you can protect your furry companions year-round.
What is Heartworm Disease?
Heartworm disease is caused by parasitic worms (Dirofilaria immitis) that are transmitted through the bite of an infected mosquito. Once a dog is bitten, microscopic larvae enter the bloodstream and travel to the heart and lungs, where they mature into adult worms. These worms can grow up to 12 inches long and live for several years, causing inflammation, blockages, and severe damage to your pet’s cardiovascular system. If left untreated, heartworm disease can be fatal.
Who’s at Risk?
Dogs are the most common victims of heartworm disease. Even indoor pets aren’t safe. mosquitoes can find their way into your home and put your pets at risk with just one bite. While cats can also be infected, the condition is far more serious and prevalent in dogs.
Missouri’s Year-Round Mosquito Threat
Due to our climate, Missouri often experiences mosquito activity throughout the entire year. Even in the cooler months, temperatures can stay high enough to keep mosquitoes alive and active—making year-round prevention a must. In fact, Missouri ranks among the top states for heartworm-positive cases annually.
Symptoms to Watch For in Dogs
- Persistent cough
- Fatigue after mild activity
- Weight loss
- Swollen abdomen
- Difficulty breathing
Cats may show signs such as vomiting, gagging, or asthma-like symptoms—but often don’t show symptoms until it’s too late.
The Cost of Treatment vs. Prevention
Treating heartworm disease is costly, lengthy, and hard on your dog’s body. Treatment can involve multiple vet visits, injections, and months of restricted activity. Prevention, on the other hand, is simple, safe, and far more affordable.
How We Help at Pinnacle Vet Clinic
We offer trusted monthly prevention options:
- Interceptor: Proven monthly chewable protection for dogs
- Credelio Quattro: 4-in-1 chewable that also protects against fleas, ticks, and intestinal parasites
- Revolution: A topical monthly prevention for cats that also guards against fleas, ear mites, and roundworms
When to Start Prevention
Now! Missouri’s mosquito season is already underway, and year-round protection is the best defense.
Don’t wait for a heartworm diagnosis to take action!
Call Pinnacle Vet Clinic today to schedule your dog’s wellness check and ensure they’re protected.
