Quote:
Originally Posted by kalina82  Last I heard, if the dog is on HW preventative year round and doesn't miss a dose then they can be tested every 2 years. they need to be tested at one year old and then after that they can start the every 2 year test. |
That's the way it has always been however, vet's still insist on annual testing...they will not trust that a dog has been given heartworm religeously.