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<blockquote data-quote="Lucky_P" data-source="post: 829981" data-attributes="member: 12607"><p>rockridge, </p><p>Shoot for 8 weeks pre-calving; no closer. Colostral antibody levels are 'set' at their highest levels at about 5 weeks pre-calving - so you want to be sure that you get the vaccines in the cows with enough time to spare so that they can have the antibody factory cranked up and ready to go at that 5 week point. If you wait 'til 5 weeks prior to calving to give the vaccinations, you've missed the boat on getting colostral antibodies to the calf.</p></blockquote><p></p>
[QUOTE="Lucky_P, post: 829981, member: 12607"] rockridge, Shoot for 8 weeks pre-calving; no closer. Colostral antibody levels are 'set' at their highest levels at about 5 weeks pre-calving - so you want to be sure that you get the vaccines in the cows with enough time to spare so that they can have the antibody factory cranked up and ready to go at that 5 week point. If you wait 'til 5 weeks prior to calving to give the vaccinations, you've missed the boat on getting colostral antibodies to the calf. [/QUOTE]
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