Heartworm disease causes serious welfare harm in affected dogs, and both the disease progression and the treatment protocol require careful welfare management.
Heartworm disease creates a dual welfare burden: the progressive suffering from cardiac and pulmonary disease as the worm burden increases, and the significant treatment-related welfare challenge of managing strict exercise restriction in dogs whose normal behavior includes significant physical activity. The inflammatory response following adulticide treatment, as the immune system responds to dying worms, can cause acute welfare compromise requiring careful management. The 4-8 week strict rest requirement is difficult to achieve in active dogs and requires significant owner commitment. Prevention is unambiguously the welfare-superior strategy, making regular preventive medication a welfare obligation for dogs in endemic areas rather than an optional health measure.