How quickly do paste wormers work to eliminate worms and bots? How can I be sure that worms have been eliminated in my horse?

Different dewormers act in different ways. Some kill the parasites quickly, while others kill more slowly. Also, some dewormers control both adult and immature parasites, while others only control parasites in the intestinal tract. Only the avermectins (ivermectin and moxidectin) control bots.
To determine if the product used is working, have a fecal flotation exam done before deworming and again about 14 days after deworming. There should be at least an 80 to 90% drop in egg count. The reason …