310 



DOMESTIC ANIMALS, DAIRYING, ETC. 



To this is added sufficient grain to bring the ration up to the 

 requirement. The proper amount must be ascertained by trial. At 

 a venture there is taken 5 pounds of corn meal and 2 pounds of 

 wheat bran. Add this to the ration and the result is 



Comparing these totals with the requirement as computed, it is 

 found that the ration is slightly deficient in energy and considerably 

 so in digestible protein, while the rather low figure for dry matter 

 shows that more feed may be added to it if desirable. Of the feeding 

 stuffs available, gluten feed is the one richest in protein, and nat- 

 urally this is used to make up for the lack of this material. The 

 ration still needs 0.33 pound of digestible protein in the ration, and 

 this will be almost exactly supplied by IMj pounds of gluten feed. 

 Making this addition, the ration stands thus: 



This ration contains almost exactly the desired amount of 

 digestible protein, but it supplies a surplus of energy which would 

 probably tend to fatten the cows rather than to cause any marked 

 increase in the milk flow. It is wished, therefore, to reduce the 

 energy content while retaining the same amount of protein. This 

 can be done by taking out some material, such as corn meal, which 

 supplies chiefly energy, and substituting for it a smaller quantity 

 of some substance like gluten feed, rich in protein. Thus, exchang- 

 ing 1 pound of corn meal for one-half pound of gluten feed gives a 

 ration which agrees very closely with the computed requirements : 



