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There is a long list of measures you must take in order to have a truly closed herd, including no fenceline contact.

Why closed cattle herds are like unicorns

It takes extraordinary measures to truly have a closed herd, and that’s why vaccinations are needed

(Note: This article has been edited and condensed.) A surprising proportion of producers believe they run a closed herd. The 2017 Western Canadian Cow-Calf Survey found that of approximately 25 per cent of respondents who did not vaccinate their cows and heifers against reproductive diseases such as IBR and BVD, over half said their reason was because […] Read more