Heartworm treatment in dogs involves a carefully managed process that causes significant temporary welfare restrictions to achieve long-term health restoration.
Heartworm treatment requires accepting significant short-term welfare restrictions — extreme exercise limitation for weeks — in exchange for long-term health restoration. A dog with heavy heartworm burden who resumes normal activity during die-off risks fatal pulmonary thromboembolism as dead worms block lung blood vessels. The welfare paradox is that the dog feels progressively better during treatment but must be prevented from acting on its improving energy. Exercise restriction in active dogs requires creative management of indoor mental enrichment while physical activity remains prohibited.