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Changes in Milk Products "Sham Fed" to Calves. I. Effects of Volume of Milk Fed¹

Dairy Department, South Carolina Agricultural Experiment Station, Clemson

ABSTRACT

1. In a series of trials each of four calves was sham fed from nipple and open pails, respectively, 25 lbs. of whole milk in five successive 5-lb. units.
   
2. Marked lipolysis, as manifested by increased acidity and concomitant acceleration, of coagulation by rennet, was observed in whole milk that was sham fed to the calves.
   
3. When the milk was sham fed from a nipple feeder, the alteration of the properties was greatest in the first portions fed and least in the last, but when fed from an open pail, the differences in magnitude of change in successive units were not marked except in rennet coagulability, which was most rapid in the second increment and less in subsequent units.
   
4. Though the degree of change in the first increments was more marked when consumed by sucking than by drinking, the alterations were similar for both systems of feeding after the third increment.
   
5. Lipolysis in the successive 5-lb. units closely paralleled the changes in degree of dilution, indicating that lipolytic agents were closely associated with the diluting medium.
   
6. The rate of intake from the open pail was from four to six times more rapid than from the nipple feeder, but the differences in rates of dilution were less, being approximately the same in the first increment but diverging in subsequent units.
   
7. The system of feeding and/or the time factor affected the dilution of the milk as the volume of intake increased.
   

¹ Technical paper no. 145, published with the approval of the Director of the South Carolina Agricultural Experiment Station.

² Now with Department of Animal Husbandry, Iowa State College, Ames.

³ Now with Research Laboratories, Carnation Co., Milwaukee, Wisconsin.

⁴ Associate Animal Pathologist, South Carolina Agricultural Experiment Station.