Identify at-risk fresh cows

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The Nov. 20, 2009, edition of this newsletter and last November’s issue of Dairy Herd Management covered research from Cornell University on the risks associated with elevated levels of non-esterified fatty acids (NEFAs) and B-hydroxybutyrate (BHBA) in fresh cows.

New research has been reported in the March Journal of Dairy Science, confirming some of these findings. Researchers found that high serum concentrations of NEFA, BHBA and low concentrations of calcium around parturition are associated with early lactation milk loss. And low calcium concentration around parturition is associated with impaired early lactation reproduction.

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