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Injury or Infection in Udders of Heifers may Terminate in Blind Quarters

Division Dairy Cattle Breeding, Feeding and Management Investigation, Bureau of Dairy Industry

ABSTRACT

Marked reduction in, or complete cessation of milk secretion in one or more quarters of the udder, is not uncommon in cows. In some cases certain quarters are "blind" throughout the entire producing life of a cow. In some States and in some cities health authorities do not permit the sale of milk from cows having an inactive quarter regardless of the cause, and in some areas such cows are not permitted to remain in the herd for breeding purposes. A better understanding of the causes and the significance of such abnormalities is much to be desired.

It has been shown (1) that the four quarters of the udder develop from entirely independent tubular formations which are present and can be detected by palpating the udder of the calf at or soon after birth. These tubular formations which extend upward from the teats toward the abdominal wall first enlarge by bulging near the center.