The primary goal of a Bulk Tank Milk Culture (BTMC) is to determine what types of bacteria are in milk. Bacteria originate from three sources: udder tissue infected with a contagious bacteria, cow's environment, including milking equipment, and bacteria flora that reside on the teat or udder skin.
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There are several reasons for raising calves without their mothers. Occasionally, a cow dies giving birth or doesn’t produce enough milk to support a growing calf. Some people buy calves to raise for beef and use grass grown on a few acres.