Why are heartworm tests performed yearly?
Whether or not your dog is on year-round heartworm prevention, our veterinarians recommend testing for heartworms every year. This is due to reasons of chance, such as the possibility of your dog not swallowing one of his/her doses, any doses that may have been missed, and also the very minimal chance that the heartworm prevention has not been 100% effective in your dog. The heartworm test we now carry also tests for Ehrlichia and Lyme disease, both transferred by ticks.
