Thanks for your question.

The reason why you probably can’t find the heartworm product is that we changed supplier a few months ago. The product we used to sell was Amber Technology’s Heartworm Free (aka HWF), whereas the products we now recommend for treating heartworm are called FourGuard and Primalix Immune:

http://www.ParvoBuster.com/recommends/FourGuardHerbalParasiteFormula.php

http://www.ParvoBuster.com/recommends/PrimalixImmuneHerbalExtractFoodDrops.php

The FourGuard will also get rid of other common parasites, and can be used as a heartworm preventative too (which was not the case with HWF).

As for a flea and tick product, TripleSure is one of the best natural treatments there is:

http://www.ParvoBuster.com/recommends/FleaAndTickSpray.php

All three of these products are formulated by Gary Le Mon, founder of Natural Wonder Pets and a Board Certified Master Herbalist.

Best wishes,

Rae & Mark

Thank you!