Deworming Advice

Deworming Advice

David Sparks Ph.D.
David Sparks Ph.D.
Weight Before Deworming Your Horse

Leave the weight-guessing game for carnivals. A weight tape helps ensure equine deworming effectiveness and prevents parasite resistance.Avoid the weight-guessing game when it’s time to deworm your horse. While a weight tape may seem simple, it could be the most valuable tool in your tack box when deworming your horse.

“It’s important for horse owners to understand that deworming treatment doses are based on the weight of the individual horse,” said Dr. Kenton Morgan, managing veterinarian, Equine Technical Services with Zoetis. “Eyeballing a horse’s weight is risky, as both under- and overdosing can contribute to resistance and safety issues. Using a weight tape or scale eliminates the guessing game and ensures an accurate dose for your horse.”

Deworming too frequently can cause parasites to be overexposed to certain active ingredients, which can cause them to become resistant. This results in fewer effective treatment options. Considering that 90% of equine internal parasites like small strongyles, tapeworms, pinworms, roundworms, bloodworms and threadworms come from the environment horses are exposed to every day, an effective deworming program is critical. Successful treatment starts with an accurate dose and an effective deworming product.

“By deworming without dosing to a horse’s accurate weight, horse owners can consequently increase their horse’s risk for parasite resistance. This can impact the horse’s response to deworming treatment and his overall health in the future,” Morgan said. “Horse owners can help prevent parasite resistance by using a simple weight tape to capture their horse’s weight for an accurate dose.”

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