[ladyjane]

Another link:

How to Convince Clients of the Need for Heartworm Preventatives | CAPC Vet

Quote from the link:

Sometimes owners give veterinarians a hard time about prophylaxis against heartworm, but Dwight D. Bowman, MS, PhD, said it isn’t too hard to convince them of the need if veterinarians talk about the disease the worms cause.

“You find them in the heart of a dead dog, which is why they’re called heartworms,” said Bowman, who is professor of parasitology at Cornell University College of Veterinary Medicine. “They sit in the pulmonary artery, and every time the heart beats, they go donk, donk, donk against the wall [causing damage].”

This is definitely one of those diseases that is easier to prevent than treat, he added. “Prevention is such an easy sell. If you really think about the alternatives, there’s no reason not to have preventatives,” he said, adding that all of the preventatives are excellent products.