IS'^EW York Agricultural Experiment Station. 93 



With a rcrhiction of protein. — The average from 33 records 

 M^lien there was a reductiou of protein as well as of total nutri- 

 ents is shown in O of the same table. These cows were some- 

 what younger and the stage of lactation a little later than with 

 the others. The shrinkage in milk flow was at about twice the 

 normal rate for this stage of lactation. There was a good gain 

 in weight before the change but much less afterward. 



REDUCING THE AMOUNT OF NUTRIENTS FROM ABOVE 15.5 LBS. TO 



LESS THAN THAT AMOUNT. 



Table XIX shows the average from 86 records when this 

 reductiou in the amount of nutrients was made. The shrinkage 

 in milk flow was at twice the normal rate under a favorable 

 ration. There was an average gain in weight of about tliree- 

 fourths pound per day before and none after the change of 

 ration. 



, With an increase of protein. — In 45 of the above recoi'ds there 

 was an increase of protein. These show an average falling off 

 in milk production slightly greater than normally occurs. The 

 average gain in weight was at the rate of about one pound per 

 day before the change of ration and less than half as much after- 

 ward. (B, Table XIX.) 



With a reduction of protein. — In 41 records there was a reduc- 

 tion of the protein. These show a shrinkage in milk flow at 

 about three times the normal rate. There was a moderate gain 

 in live weight before and considerable loss after the change of 

 ration. (C, Table XIX.) 



REDUCING THE AMOUNT OP NUTRIENTS TO NOT LESS THAN 15.5 LBS. 



The averages from 50 records, each of which covers a period 

 when this reduction of nutrients was made, are found in Table 

 XX. There was, on the average, considerable reduction of pro- 

 tein. The milk flow diminished somewhat more rapidly tlian 

 usual. The rate of increase in live weight was a good one but 

 somewhat slower after the change of ration. 



