“Great product I definitely recommend. I see no reason to pay extra money just for a brand name. My boy had heartworms when he was rescued at 1yo. He's almost 5 & has been on Iverhart Plus almost the whole time (vet talked me into trying something diff). He likes this & I like everything it covers with affordable price. His heartworm & other test comeback perfect, plus no side effects...so that's why we love it.”