in somewhere like Florida I wouldn’t risk going without actual heart worm preventative. If you want to limit your pups exposure to toxins, switching to heart guard is good alternative. If needed you could always add front line on a as needed basis for fleas and other parasites. my dog gets heart guard and front line, although we’re just now having our first flea problem (front line isn’t 100%!), I like giving her heart guard because I can actually see her eat it, instead of alternatives where you can apply it to the skin (although I’m sure they’re just as effective, it makes me more comfortable to give a eatable preventative), and living by the woods she gets into tick infested areas often, the front line seems to help with that. She had to undergo heart worm treatment earlier this year, and it was a terrible experience. I know that Florida has very very high heart worm rates, so in my personal opinion you should keep your dog on an actual preventative and save the natural remedies for less threatening parasites like fleas.
