Originally Posted by RedHorseRidge
At my seminar this group of vets and some reps from Farnam/Pfizer both said there is nothing in the works as far as new wormers... quest is pretty much it right now for chemical wormers (but this was a couple years ago). That's why they were adamant about having fecals done and having people develop targeted deworming programs... so the worms didn't develop a resistance to the last truly effective chemical.
They did, however, say that research was being done on some herbal remedies that had some luck in stopping the hatching of eggs.
Well, my dear friend died of cancer at 30. If not for cancer, he would have lived much longer. He had lived w me in 5 different states (5 diff environments). When he was in isolated herds I only ever wormed him twice a year. Before wormers, 30 would have been considered very old. Yet, my grandfather had several (granted it was a minority) horses that died of "natural causes" around 30 - that was decades ago before ivermectin. He always ran his horses (he had many) w cattle and sheep on purpose. They are now
"re-discovering" that that is very effective in keeping worm load down. I think the "silver bullets" often result in losing valuable imperical knowledge.
It is management as much as worming, IMO. Poor management leaves the greatest potential to develope resistance. All I feel anyone can do to combat the growing threat is stay informed, use common sense and manage their own "around" resistancies and reactions. In this case (moxidectin), it is a "personal" decision.