Is annual heartworm testing mandatory to purchase heartworm meds?

Answer

Some vets will not give you a prescription for heartworm preventative until you have a test done. It is not mandatory in any state. If your vet does not want to give you a prescription, you can purchase the preventative online.

Updated on April 12, 2018

Original Article:

Why Your Dog Does Not Need a Heartworm Test Every Year
By Dr Mark
working