Heartworm Prevention for Dogs and Cats: Why Year-Round Prevention Matters

April is National Heartworm Awareness Month, a time to highlight the serious risks heartworms pose to pets and the importance of prevention.

Heartworm disease is a potentially fatal condition spread by mosquitoes. In the Lowcountry, our warm, humid climate allows mosquitoes to thrive nearly year-round, putting pets at constant risk.

At Mount Pleasant Animal Hospital, we strongly recommend year-round heartworm prevention to keep your pet protected every season. Keep reading to learn more!

Heartworm Prevention for Dogs and Cats: What Is Heartworm Disease?

Heartworms are parasites that live in the heart, lungs, and blood vessels of infected pets. They are transmitted through mosquito bites, meaning even indoor pets are at risk.

Over time, heartworms can cause:

  • Lung disease
  • Heart failure
  • Organ damage
  • Reduced quality of life

Dogs are the most commonly affected, but cats can also develop serious and sometimes fatal complications.

Heartworm Prevention for Dogs and Cats: Why the Lowcountry Is High Risk?

The Lowcountry climate creates the perfect environment for mosquitoes to breed and remain active throughout the year.

Unlike colder regions, where heartworm risk is seasonal, pets here are exposed year-round. Skipping even a single month of prevention can leave your pet vulnerable.

Heartworm Prevention for Dogs and Cats: The Importance of Year-Round Prevention

Heartworm prevention is safe, simple, and highly effective. Most preventives are given monthly and work by eliminating immature heartworm larvae before they can grow into dangerous adults.

Benefits of prevention include:

  • Protecting your pet from a life-threatening disease
  • Avoiding costly and complex treatment
  • Providing peace of mind year-round

Consistency is key; missing doses increases risk.

Heartworm Prevention for Dogs and Cats: How Heartworm Treatment Works

If a dog tests positive for heartworms, treatment is a long and carefully managed process.

Treatment typically involves:

  • Diagnostic testing and imaging
  • A series of injections to kill adult worms
  • Strict exercise restriction for several weeks
  • Follow-up testing

During treatment, pets must remain calm and limit activity to reduce the risk of complications as the worms die.

Unfortunately, there is no approved treatment for heartworms in cats, which makes prevention even more critical.

Heartworm Prevention for Dogs and Cats: Prevention vs. Treatment (Cost and Risk)

Heartworm prevention is significantly more affordable and safer than treatment.

Prevention:

  • Monthly medication
  • Minimal cost
  • No recovery time
  • Highly effective

Treatment:

  • Expensive and time-intensive
  • Requires multiple vet visits
  • Involves strict confinement
  • Carries a risk of complications

Simply put, prevention is the easier and safer choice. For more information on monthly prevention, watch this short video:

Heartworm Prevention for Dogs and Cats: Protecting Your Pet Year-Round

The best way to protect your pet is to:

  • Keep them on year-round heartworm prevention
  • Schedule annual heartworm testing (for dogs)
  • Stay consistent with monthly doses
  • Talk to your veterinarian about the best product for your pet

Even indoor pets need protection, as mosquitoes can easily make their way inside.

Heartworm Prevention for Dogs and Cats: Your Partner in Heartworm Prevention

At Mount Pleasant Animal Hospital, we’re committed to helping Lowcountry pets stay safe and healthy year-round. From preventive guidance to emergency care, our team is here when you need us most.

If you have questions about poison prevention, heartworm protection, or want to review your pet’s safety plan, call us at (843) 884-4921 or request an appointment online.

Mount Pleasant Animal Hospital is proud to be part of Animal Hospitals of the Lowcountry, a family-owned network of trusted veterinary hospitals, including:

  • Mount Pleasant Animal Hospital – South Mount Pleasant (Coleman Blvd & Old Village)
  • Shuler Veterinary Clinic – Central Mount Pleasant (Town Center)
  • Safe Harbor Animal Hospital – North Mount Pleasant (Hwy 41)

Together, we’re helping Lowcountry pets live safer, healthier lives, this season and beyond.