Waging War on Worms
For decades, horse owners have followed a standard regimen for deworming their horses: treating all horses on the farm every two months and rotating which drugs are given at each worming. In recent years, however, many parasites have developed resistance against the very drugs that are intended to kill them. That means horse owners need to seriously rethink the traditional approach to parasites, advises Dr. Martin Nielsen of the Gluck Equine Research Center at the University of Kentucky, whose research focus is parasite control in horses. And there’s no time to waste. “Drug-resistant parasites are already a serious problem,” he explains. “They have been reported all over the world. And every drug on the market has some parasites that are resistant to it.” The Worst Culprits Dr. Maureen Anderson, lead veterinarian for Animal Health and Welfare for the Ontario Ministry of Agriculture, Food and Rural Affairs, says, “Cyathostomes (small strongyles)…
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