Deworm debunk: Should you use a 5-day dewormer on your horse?


Today we take a look at the effectiveness of five-day wormers.

“Unfortunately, there is so much resistance in small strongyle parasites to benzimidazole type dewormers,” parasitologist Martin Neilsen says.

“We’ve documented resistance at both the larval stage and the adult stage of the parasite.”

But, Nielsen says, benzimidazoles wormers still work well against ascarid parasites, including against the large roundworms of the foals.

“So every product still has a place.”

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» Next: Do you deworm with diatomaceous earth? Here’s why you shouldn’t

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Visit Martin Nielsen’s Network for Good page, and his University of Kentucky page.

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