Sadly, I have seen the results of the holistic approach to heartworms. Yes, people can voice their opinions and all I can say is that I am happy to see that many don't listen to scare tactics and continue to protect the lives of their pups. If people really want to play Russian Roulette with their dog's health, there sadly is nothing anyone can do. They are not protected like children....and heck even children are being neglected and exposed to illnesses that they could be immunized against.
Here is a link to a thread about one very sweet pup, Callie, who died as a result of not being protected from heartworms. I will also be bumping that thread so that people who may be on the fence can gain some knowledge about this topic.
http://www.yorkietalk.com/forums/yor...kill-dogs.html