Heartworm prevention for dogs is crucial for protecting pets from a potentially life-threatening condition caused by parasitic worms transmitted through mosquito bites. While effective heartworm preventatives are available, they typically require a prescription from a veterinarian. Some pet owners may attempt to find heartworm prevention for dogs without vet prescription, but this can be risky. Without professional guidance, the correct dosage or appropriate product for the dog’s age, weight, and health condition may not be determined. Additionally, improper use of heartworm medication can lead to adverse effects or inadequate protection. Consulting with a veterinarian is always recommended before administering heartworm prevention.