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The Value of Oxytocin for Reducing Fluctuations in Milk and Fat Yield¹

ABSTRACT

An experiment was conducted to determine whether the daily variation in milk and fat yield and fat test may be reduced by administering oxytocin at milking time to insure a complete milk-out. It was found that oxytocin did not reduce this variation when good milking practices were employed. Use of oxytocin caused a highly significant increase in total milk and fat without a significant change in the fat test.

In a second experiment, high- and low-fat diets were compared, first by normal milking procedures and then using oxytocin as an aid to complete milking. The total milk yield was not affected by the high fat intake. There was a significant increase in fat yield and fat test in favor of the high-fat diet. This was shown as clearly without the use of oxytocin as when it was used.

¹ Published with the approval of the Director of the Wisconsin Agricultural Experiment Station.

² Present address: Eastern States Farmers' Exchange, West Springfield, Mass.

³ Department of Dairy Husbandry, University of Wisconsin.