We recommend heartworm preventative for both dogs and cats, as well as yearly heartworm testing for dogs. (woodlandvets.com)
Some companies will guarantee their product providing you use the heartworm prevention year round and are performing yearly heartworm tests. (wpvet.com)
We will be glad to talk to you about the need for yearly heartworm tests in your dog and how you can prevent this fatal disease. (tri-cityanimalclinic.com)