Parasite management – Resistance is futile…. Parasite management is a concern for anyone raising livestock.  Coming from a horse and cattle background, frequent treatment for internal parasites was the norm for me.  We commonly dewormed our cows several times a year.  The horses were dewormed fall and spring.  I don’t remember anyone ever talking about resistance to these drugs being an issue, although in cattle it is now becoming one.  The first year we had our sheep, when I consulted my veterinarian about what dewormer to administer, he cautioned me about the potential for drug resistance to form without careful …

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