In conclusion, while the appeal of using horse wormers as a convenient and inexpensive method to treat heartworms in dogs is understandable, the risks far outweigh the potential benefits. Responsible pet ownership entails seeking veterinary advice and adhering to professional recommendations when it comes to treating such serious health concerns. Ultimately, the well-being of our pets should always take precedence, and relying on proven, veterinary-approved treatments is the best approach to ensuring their health and longevity.