Heartworm disease causes severe cardiorespiratory suffering and is difficult to treat. Prevention is safe, affordable, and represents a fundamental welfare responsibility for dog owners in endemic areas.
Heartworm disease causes progressive suffering: coughing, exercise intolerance, breathing difficulty, and eventually heart failure. The disease is entirely preventable with safe, well-tolerated monthly medication that costs significantly less than treatment. Dogs in endemic areas who do not receive prevention are exposed to a preventable welfare risk. The treatment itself causes significant welfare burden — months of strict rest, painful injections, and risk of treatment complications. Prevention is not merely convenient but a genuine welfare obligation in areas where heartworm is present.