Dewormers aren’t working the way they used to, and treating the whole herd may be part of the problem. Dr. Leonor Sicalo Gianechini, a parasitologist at the University of Georgia, explains how drug resistance develops and why targeting only the animals that need treatment, dosing by actual weight, and combining drug classes can keep dewormers effective longer. She also lays out a simple five-step plan that cattle, sheep, and goat producers in the Southeast can start using right away to cut parasite losses on their operations.
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