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Reestablishment of the Arterial Supply to the Udder^*

Dairy Husbandry, Iowa State College

ABSTRACT

The right external pudic artery was ligated on a month-old heifer calf. An inch of the artery was removed just below the inguinal canal after which she was allowed to develop in a normal fashion (as far as the udder was concerned). On freshing, this cow milked equally well from both halves of the udder. No appreciable differences (0.2 lb. per milking) could be found in the amount of milk secreted by either half of the udder, in the physical characteristic of the two halves, or in the manner of secretion.

After two normal lactations, this cow was destroyed and the left mammary artery injected with lead oxide paste. When the arterial vessels were exposed it was found that the arterial supply to the right half of the udder came exclusively from the caudal branch of the left mammary artery. The blood supply from the right external pudic artery was not reestablished.

^* Journal Paper No. J-1085 of the Iowa Experiment Station, Ames, Iowa. Project No. 814