This message is from: [EMAIL PROTECTED] Mark,
Yes, Ivermectin does kill more stages of parasites than Strongid. However, the Strongid-C when fed daily prevents the parasites from reestablishing themselves in the horse. Therefore, there is no need to keep deworming with Ivermectin. You initially give the Ivermectin to clear out the horse. Then you immediately start the Strongid-C. The reason that you deworm at the end of the year (after hard frost) again with Ivermectin is to kill the bots which Strongid doesn't prevent. If you have a severe bot problem you can hit them with an Ivermectin in mid-summer. Bots rarely cause that much of a problem so the late year deworming is usually sufficient. So, to deworm with Ivermectin every 6-8 weeks when on daily Strongid-C is a waste of money. Steve White, DVM Sport Horse Veterinary Service Gretna, NE
