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<blockquote data-quote="Lucky_P" data-source="post: 1624327" data-attributes="member: 12607"><p>I know most here won't want to hear this...and probably will pay no heed, but...</p><p>The only animal that should ever see LR is something that's gonna have its head cut off, like stockers - which should not run with, or on same ground with the cow-calf herd. </p><p>Use in a cow-calf operation is a disaster in the offing, with regard to rapidly selecting for resistant nematode parasites. It's there every second of every day for months. Is the dose you gave that 200#calf still appropriate and effective 5 months later when he's 300-500# heavier? IDK, but I've got doubts...but regardless, it's still there, selecting for resistant parasites.</p><p>LR-treated heifers should not be brought back into the breeding herd...they'll be bringing resistant worms with them.</p><p>Resistance to the ML and benzimidazole dewormers appears to be 'forever' once you've selected for it in your herd/on your premises.</p><p>And, using LR - or any pour-on macrocyclic lactone(ivermectin class) for 'fly control' is sheer lunacy.</p></blockquote><p></p>
[QUOTE="Lucky_P, post: 1624327, member: 12607"] I know most here won't want to hear this...and probably will pay no heed, but... The only animal that should ever see LR is something that's gonna have its head cut off, like stockers - which should not run with, or on same ground with the cow-calf herd. Use in a cow-calf operation is a disaster in the offing, with regard to rapidly selecting for resistant nematode parasites. It's there every second of every day for months. Is the dose you gave that 200#calf still appropriate and effective 5 months later when he's 300-500# heavier? IDK, but I've got doubts...but regardless, it's still there, selecting for resistant parasites. LR-treated heifers should not be brought back into the breeding herd...they'll be bringing resistant worms with them. Resistance to the ML and benzimidazole dewormers appears to be 'forever' once you've selected for it in your herd/on your premises. And, using LR - or any pour-on macrocyclic lactone(ivermectin class) for 'fly control' is sheer lunacy. [/QUOTE]
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