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Effect of Calf Calls on Rate of Milk Release of Dairy Cows

Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario N1G 2W1

ABSTRACT

The effect of tape recorded vocalization of young calves on the rate of milk release was studied with 16 dairy cows. The reproduction of the calf calls started just as the cows were entering the milking parlor and ceased when the least teat cup had been placed on the 16th cow. Total stimulation per milking varied from 90 to 120 s. To determine possible changes due to repetition and/or familiarization, the stimulation periods covered 1, 3, or 5 days, interchanging randomly with equally varying periods of nonstimulation. The experiment lasted 108 days and overall included an identical number of days of stimulation and nonstimulation. The measured response was the amount of milk released in the first 2 min of milking. The 2-min milk yields increased slightly with days of stimulation. Variation between cows in their responsiveness to the stimulation, defined as the difference between periods of nonstimulation and stimulation, was relatively small.

This article has been cited by other articles:

				K. P. Waller, T. Westermark, T. Ekman, and K. Svennersten-Sjaunja Milk Leakage--An Increased Risk in Automatic Milking Systems J Dairy Sci, November 1, 2003; 86(11): 3488 - 3497. [Abstract] [Full Text] [PDF]