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Health & Nutrition
Internal Parasite Control in Spring Calving Herds
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<blockquote data-quote="Ebenezer" data-source="post: 1806080" data-attributes="member: 24565"><p>I did not say it was an old report but old style. It totally misses the building problem of resistance, using FECs to see if cattle even need worming and the purpose of refugia... I likely shared that I have done FECs on weaned calves which had never been wormed in the past couple of years. All except one or two were below the threshold to treat. I have pressured the herd to build resistance by not worming anything over 3 YO for the past 15 to 20 years. Flukes are different if you have them. But wholesale worming is not really smart.</p><p></p><p>We've had St. Croix sheep since 2006. All breeders are "zero wormer needed". FECs in the past several years identified lambs clearly as little resistance (a few), resilience (fair amount) and resistance (majority). I culled based on FECs to take out about half of the flock including ewes that had lambs with either lesser resistance or resilience. </p><p></p><p>This is in the humid SE USA. Sometimes you have to step up and go it without the majority. But it makes my life easier and I can sell with confidence.</p></blockquote><p></p>
[QUOTE="Ebenezer, post: 1806080, member: 24565"] I did not say it was an old report but old style. It totally misses the building problem of resistance, using FECs to see if cattle even need worming and the purpose of refugia... I likely shared that I have done FECs on weaned calves which had never been wormed in the past couple of years. All except one or two were below the threshold to treat. I have pressured the herd to build resistance by not worming anything over 3 YO for the past 15 to 20 years. Flukes are different if you have them. But wholesale worming is not really smart. We've had St. Croix sheep since 2006. All breeders are "zero wormer needed". FECs in the past several years identified lambs clearly as little resistance (a few), resilience (fair amount) and resistance (majority). I culled based on FECs to take out about half of the flock including ewes that had lambs with either lesser resistance or resilience. This is in the humid SE USA. Sometimes you have to step up and go it without the majority. But it makes my life easier and I can sell with confidence. [/QUOTE]
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Internal Parasite Control in Spring Calving Herds
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