What Every Pet Owner Should Know About Heartworms

Heartworms are a serious threat to pets, and many owners do not realize how dangerous they can be until symptoms appear. Heartworm disease develops when infected mosquitoes transmit parasites that grow and live in the heart, lungs, and blood vessels. For dogs especially, untreated heartworms can lead to lasting damage and major health complications.

How Pets Get Heartworms

Heartworms are spread through mosquito bites. When a mosquito carries heartworm larvae and bites your pet, those larvae enter the bloodstream and begin maturing over time. Because mosquitoes are common in Colorado during warmer months and can still be present indoors, heartworm prevention should be part of your pet’s year-round care plan.

Dogs are the most common victims of heartworm disease, but cats can also be affected. In cats, even a small number of heartworms can cause serious respiratory and inflammatory issues.

Why Heartworms Are So Dangerous

Heartworms often go unnoticed in the early stages. A pet may seem healthy while the parasites continue to grow and cause internal damage. As the disease progresses, pets can develop coughing, fatigue, breathing issues, reduced stamina, and weight loss.

Without treatment, heartworm disease can lead to severe lung disease, heart strain, and in some cases, life-threatening complications. This is why routine screening and prevention are so important for long-term pet health.

Signs Pet Owners Should Watch For

Some pets show few symptoms at first, but common warning signs may include:

• Mild but persistent cough
• Tiring easily after exercise
• Decreased appetite
• Weight loss
• Labored breathing
• Reluctance to play or stay active

If you notice any of these changes, our veterinary exam can help determine whether heartworms or another health issue may be involved.

Prevention Is Better Than Treatment

Heartworm prevention is much safer, easier, and less costly than treating active heartworm disease. Preventive medication works by stopping immature heartworms before they can develop into adult parasites. Regular heartworm testing also helps ensure your pet stays protected.

For dogs, annual testing is recommended even if they are on prevention. Cats should also be evaluated based on lifestyle, risk, and overall health. Preventive care gives pet owners peace of mind and helps avoid more serious problems later.

What Treatment Usually Involves

If a dog tests positive for heartworms, treatment can be a longer process. It may include additional testing, medications, activity restriction, and close monitoring. Because treatment can place stress on the body, early detection makes a major difference.

Cats do not have an approved treatment for heartworms in the same way dogs do, which makes prevention even more important. For both dogs and cats, a proactive approach is the best defense.

Protecting Pets in Castle Rock

Heartworm prevention is one of the most important steps pet owners can take to support their pet’s health. Regular wellness visits, parasite screenings, and preventive medications all play a role in reducing risk. Staying ahead of heartworm disease helps protect your pet from avoidable complications and supports a healthier, more active life.

Schedule your pet’s heartworm screening and preventive care with Brekke Veterinary Clinic. Visit our Aloha Street location in Castle Rock, Colorado, or call (303) 474-4260 to book an appointment today.