NEWS
Resistance Check
Mon May 27, 2013 07:38 PM CDT

In 2009, Extension agent Mark Hucks, of Nash County, N.C., received a call from a stocker operator saying his calves weren't performing normally. Although the young calves had been treated with a pour-on dewormer, the animals had rough coats and weren't eating well or gaining weight.

As Hucks and the producer discussed the possibility of internal parasite resistance, they contacted North Carolina Extension veterinarian Mark Alley. Turns out, the producer had been using a generic pour-on ivermectin for several years, even though he'd heard about resistance. But he never considered his calves' poor ...

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