Protect the Value of Dewormers

It happened in sheep and goats, and now it’s happening in cattle. Parasites are developing resistance to the drugs we use to fight them.

The problem in U.S. cattle herds has not, in most cases, become severe just yet, but scientists fear without preventive action, cattle parasites could become like those in small ruminants, where available drugs have almost no benefit in many herds.


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