Keys to Heifer Reproduction Success
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By Craig Redeker, Dairy Account Manager & Consultant
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CO LOS TRU M TI M I N G & Q UA NTIT Y
With each minute that passes after birth, a calf’s ability to absorb antibodies is reduced. Ideally, calves should be fed 4 quarts of colostrum within the first few hours of life. If manageable, a second feeding of 2-3 quarts of colostrum 6 to 12 hours later is also recommended, according to Michigan State University Extension, because by 24 hours the gut is almost completely closed and can no longer absorb antibodies.1 Getting that colostrum in the calf quickly is vital, as it’s the calf’s only chance to receive essential immunity, nutrients, growth factors and hormones that help it not only survive but thrive.
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CO LOS TRU M Q UA LIT Y
It's not enough to feed just any colostrum. To ensure colostrum is good quality, test it using a Brix refractometer. Studies have shown a Brix value of 23% is a good cutoff point in determining colostrum quality (23% being the minimum). If your colostrum is not up to standards, GENEX offers SCCL colostrum products to supplement your colostrum feeding program. A good way to test if your colostrum program is working and calves are absorbing the IgG from the colostrum is to check blood protein serum levels 48 hours after colostrum is fed. The goal is total protein levels in the blood above 5.5 g/dl. Good colostrum feeding practices and feeding more colostrum can lead to improved average daily gain, reduced treatment costs and better feed conversion efficiency. Continued on next page ... HORIZONS
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