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<blockquote data-quote="Lucky_P" data-source="post: 1317983" data-attributes="member: 12607"><p>truegrit, </p><p>It's easy to get on a high horse. </p><p>I see the problems with anthelminthic(dewormer) resistance on a daily basis - particularly in sheep and goats. </p><p>Cattle...not so much. It's been nearly 20 years since I saw 'worms' actually kill a cow... largely because ivermectin has been so very effective in eliminating Ostertagia on most premises. </p><p>IMO... I'm not convinced that it's even worthwhile to deworm most adult cows (older than 4 yrs) - and I usually don't. Ever. </p><p>Yeah, I know there are Extension bulletins showing that deworming the cow translates to a 31 pound (or something similar) increase in weaning weight of calf... and, if that's true... it's probably economically advantageous... but I'm not convinced that the cow herself benefits all that much. </p><p></p><p>That said... any $ spent controlling hornflies will return much more in the way of productivity $$ than any $ spent 'deworming' cattle for internal parasites. Ectoparasites - particularly hornflies - have a much greater economic impact on beef/dairy production than 'worms'.</p></blockquote><p></p>
[QUOTE="Lucky_P, post: 1317983, member: 12607"] truegrit, It's easy to get on a high horse. I see the problems with anthelminthic(dewormer) resistance on a daily basis - particularly in sheep and goats. Cattle...not so much. It's been nearly 20 years since I saw 'worms' actually kill a cow... largely because ivermectin has been so very effective in eliminating Ostertagia on most premises. IMO... I'm not convinced that it's even worthwhile to deworm most adult cows (older than 4 yrs) - and I usually don't. Ever. Yeah, I know there are Extension bulletins showing that deworming the cow translates to a 31 pound (or something similar) increase in weaning weight of calf... and, if that's true... it's probably economically advantageous... but I'm not convinced that the cow herself benefits all that much. That said... any $ spent controlling hornflies will return much more in the way of productivity $$ than any $ spent 'deworming' cattle for internal parasites. Ectoparasites - particularly hornflies - have a much greater economic impact on beef/dairy production than 'worms'. [/QUOTE]
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