05/21/2026
“Hey Doc, my cousin’s uncle’s sister’s mom’s dog got them Heartworms… I give mine a pill every month, but could they get it from her dog?” 🦟🐶🐱
Heartworm disease is a serious and potentially life-threatening condition affecting both dogs and cats. It is caused by long, spaghetti-like worms that live in the heart, lungs, and surrounding blood vessels.
The good news? Pets cannot spread heartworms directly to each other. Heartworms are ONLY spread through mosquito bites. When a mosquito bites an infected animal, it picks up microscopic larvae and then deposits them into another pet during its next bite. Over several months, those larvae develop into adult worms that can cause severe damage to the heart and lungs. Because mosquitoes can easily enter homes, both indoor and outdoor pets are at risk.
In dogs, heartworms can grow to full size and exist in large numbers, leading to:• Coughing• Exercise intolerance• Weight loss• Heart failure and severe lung disease
Cats are not natural hosts, so they usually have fewer worms, but even ONE worm can cause:• Coughing• Vomiting• Difficulty breathing• Sudden collapse or death in severe cases
Prevention is the safest and most effective protection. Monthly oral or topical preventives, as well as long-acting injectable options for dogs, work by killing immature larvae before they become adult worms. We recommend year-round prevention for ALL pets, regardless of lifestyle.
Treatment for dogs is available, but it is lengthy, expensive, and requires strict exercise restriction. Unfortunately, there is NO approved treatment to remove adult heartworms in cats, making prevention especially important for them.
Heartworm disease is common, dangerous, and almost entirely preventable. Keeping your pets on routine prevention is one of the best ways to protect their long-term heart and lung health. ❤️
Schedule an appointment today to get your furry companions protected!