I don't really see much RESEARCH there. What I see is a lot a statistics re:heart worm prevalence,a lot of opinions, scare tactics and product promotion.
The last dog we had was on heart worm prevention, monthly. He died at 17 1/2yrs. I feel sad to think, I poisoned him all those years, he may have lived to be 100
So, even in light of this "research", I choose to continue with the heart worm medication And Im out of this thread.


. <----- 2 healthy yorkies on heart worm protection