MILK PRODUCTION 



183 



following will be sufficient to demonstrate the 

 point: 



The chief points to notice are that the yield gradually 

 increases with the age of the cow, and the percentage of 

 fat was highest in the milk of young cows or heifers, but 

 after the third year the quality gradually declined. 



6. First and Last drawn Milk. The first quart of 

 Shorthorn milk may not contain more than 2 per cent, 

 of fat, and sometimes less, while the last quart drawn at 

 the same milking may run up to 6, 7, or 8 per cent. fat. 



Difference in Composition between First and Last drawn Milk. 



The strippings may quite easily contain 10 per cent, 

 fat. These results are not altogether explained by the 

 cream being lighter and partially separating in the 

 udder, but partly by the greater resistance or friction 



