Doxycycline kills a bacteria that lives in the worms and is essential for their embryos to develop. 3-4 wks 200mg/day. Stay out of sunshine while on Doxy. Once you can reduce the number of eggs laid, you can start to decrease adult & larval numbers. Email me for info to buy online. Moxidectin PLUS is a horse wormer with Moxi (a long lasting form of Ivermectin) AND praziquantel which works on flat worms. 1 dose lasts for several months. Must be careful not to overdose. I take my weight on dial 1x/mo. NASTY tasting. I put on butter & drink it down with coffee. Moxi can cause low BP (just lie down awhile) but basically benign. Do not take IVM and Moxi as will overdose.