04/14/2025
Heartworm is a dangerous, deadly disease that spreads easily from pet to pet with help from mosquitoes. We encourage you to schedule your pet’s annual heartworm screening and restart their heartworm preventative medication this month if you haven’t done so already.
Here are some of the common questions we get about the disease:
WHAT ARE HEARTWORMS?
Heartworms are foot-long worms that infest the heart, blood vessels, and lungs of our pets. They can cause severe damage to major organ systems, including lung disease and heart failure.
WHERE DO THEY COME FROM?
Heartworms are transmitted as larvae from mammal to mammal by mosquitoes, so they're more prevalent in warmer seasons and climates. Heartworm mature into full-grown adults in about six months, and they can live up to 5-7 years in dogs and 2-3 years in cats.
WHAT ARE THE SYMPTOMS?
Some pets never show signs of heartworm, which is why annual heartworm tests are so important. As the disease progresses, signs may include coughing, fatigue, lack of appetite, and weight loss.
HOW DO YOU PREVENT THEM?
The medications used to treat heartworm do not work for cats, which makes prevention even more important for our feline friends. Many flea treatments also protect against heartworms. To further protect your pet, avoid heavily mosquito-infested areas.