I need some advice on my local vets advice. He says that no heartgard is necessary before 8 months of age, because the worms will cycle themselves out? This doesn’t sound right to me. I’ve always done heart worm prevention, as long as I have a puppy, they’ve had heart worm prevention, always. My vet is a small town vet, he mainly specializes in farm animals, so that might have something to do with where his advice is coming from? I don’t know. Advice? Heart worm prevention needed before 8 months of age or am I wasting my money??