Welcome to the 39th issue of Angus e-List

Unseasonably Warm Weather Demands
Additional Deworming Efforts

VERONA, Wis. – The stretch of unusually warm late fall weather across much of the United States has been great for people, great for cattle and, unfortunately, great for the larvae of the internal parasites that can plague cattle. Without a hard frost to kill the grass in which it lives, the larvae remain active and can recontaminate herds that under colder conditions adequately dewormed for winter.

"We’re seeing high fecal egg counts in our lab for this late in the fall," says Don Bliss, Ph.D., director and owner of Mid-America Agricultural Research, Inc., in Verona, Wis. "Cattle that are on pasture or have been exposed to contaminated areas pick up the larvae as they graze and start the cycle of infection all over again. The cattle you think are clean can be carrying worms and shedding eggs through winter if they aren’t dewormed again late this fall.

"Farmers should treat the cattle with a feed additive, mineral or block form of a fenbendazole dewormer, which ensures a complete kill without the added stress of handling the animals," Bliss recommends. "They should also do a fecal egg count test to make sure their herds are clean going into winter."

The animal health company Intervet offers its Safe-Guard® dewormer in these forms through distributors nationwide. Producers should consult their veterinarian or an Intervet representative to find out about fecal egg count testing and the appropriate use of nonhandling forms of Safe-Guard dewormers.

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