[kjc]

Originally Posted by ladyjane

This is something I have never heard of. The Doxycycline, to my knowledge, is given to eliminate the Wolbachia (spelling?) organism. I have never seen where it has any effect on the heartworms.

Do you perhaps recall where you read that?

Wolbachia - Wikipedia, the free encyclopedia

Effects of doxycycline on the endosymbiont Wolbach... [Vet Parasitol. 2010] - PubMed result

Combined ivermectin and doxycycline treatment has ... [Int J Parasitol. 2008] - PubMed result

Wolbachia bacterial endosymbionts of filarial nema... [Adv Parasitol. 2005] - PubMed result

Here's the beagle Doxy study!
Heartworm and Wolbachia: therapeutic implications. [Vet Parasitol. 2008] - PubMed result

DogAware.com Health: Heartworm Disease in Dogs - Prevention and Treatment

Wolbachia-lives symbiotically inside heartworms. | Medical Reference

Originally Posted by ladyjane

I am very aware of Denamarin and had a pup that was on it years ago.

Oh, I couldn't tell by your posts...