Heartworm disease causes progressive heart and lung damage in dogs and is entirely preventable with monthly medication. Understanding the welfare cost of heartworm motivates consistent prevention.
Heartworm disease causes a welfare trajectory that begins invisibly and ends in serious suffering from heart failure, exercise intolerance, respiratory distress, and pain. The tragedy is that this entire disease progression is preventable with a monthly tablet costing a few dollars. Dogs that develop heartworm disease often do so because owners are unaware of prevention, lapse in compliance, or face financial barriers to veterinary products. The welfare imperative is clear: heartworm prevention is one of the most cost-effective welfare interventions available for companion dogs, with complete prevention achievable through consistent use of an inexpensive product. The barrier is overwhelmingly one of awareness and access rather than technical complexity.