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The Stage of Lactation as a Factor in the Variation of the Per Cent of Fat in Cow's Milk

Department of Dairy Husbandry, University of Missouri, Columbia, Missouri

ABSTRACT

It is shown that under conditions such as ordinarily prevail in the management of dairy cattle, and independent of the season of the year or character of the diet, the stage of lactation does have an influence on the per cent of fat in cows' milk. There is a noticeable decline in the per cent of fat from the first month to the second and in some cases this influence continues in a less degree for at least three months. Following the low period there is a gradual increase in the per cent of fat which becomes more pronounced during the last month of lactation.