
05/11/10, 07:21 PM
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Join Date: Oct 2005
Location: Southside Virginia
Posts: 687
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We have had to address that same issue this year, the first in 8 years with cows. 2 of them started to have bare patches of hair, a few inches in diameter. We waited and the patches got more numerous and larger, so I suspected lice. Pouron Ivermectin (Ivomec) did the trick, they have cleared up in the last 2 weeks. We added 10 cows to the herd last fall and the 2 with the spots were from that batch. Lice live on the cows through the winter bt don't usually show up til spring when the hair falls off or is rubbed off.
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