Advanced heartworm management addresses regional variation in risk, resistance concerns, and the welfare implications of treatment for established infection.
Heartworm treatment welfare requires commitment to the multi-month protocol including exercise restriction — the aspect most commonly violated by owners whose dogs appear healthy post-injection. Dead worm emboli released during exercise cause pulmonary welfare events ranging from clinical crisis to fatal thromboembolism. The welfare case for treatment is clear when infection is confirmed, but the treatment protocol itself is welfare-demanding. Prevention costs approximately 1% of treatment cost and 0% of the welfare cost to the dog — the economic and welfare arguments for prevention are among the most straightforward in veterinary medicine.