If you have a dog or cat, you’ve probably heard a lot about heartworm disease, as us veterinarians like to spend a lot of time talking about it. Heartworms, as you might imagine from the clever nomenclature, are worms that live in the blood vessels of the lungs and the heart of your furry friends. This is a problem because what is suppose to be in the heart and vessels is blood; a foot-long worm tends to obstruct and disrupt the blood flow. (This can result in lots of problem