96 Rerort oF DEPARTMENT OF ANIMAL HUSBANDRY OF THE 
With but little change of protein.—There were only 15 records 
when but little change of protein occurred. There was a falling 
off in milk yield greater than usual. The gain in live weight 
was at the rate of about one-half pound per day before and at 
about one-third pound per day after the change. 
With some reduction of protein.—The average from 385 records 
when there was a reduction of protein shows something more 
than the normal shrinkage in milk flow (C, Table XX). The 
rate of increase in live weight, over a pound per day before the 
change of ration, was about half as much afterward. | 
REMARKS. 
The proportional increase or reduction of the total nutrients 
in corresponding groups was not always regular but varied con- 
siderably. In general the milk flow increased most or dimin- 
ished least when the highest percentage of increase was made in 
the amount of total nutrients, without regard to the protein 
content. Among the groupings of records in which the amount 
of nutrients was reduced, the most rapid shrinkage in milk 
flow occurred generally when the percentage reduction of nutri- 
ents was greatest, although this usually was associated with a 
reduction of the protein. 
A statement of the general results accompanying changes 
which related to different amounts of total nutrients, is given 
in the summary. 
THE ENERGY OF THE RATION. 
As a rule, the fuel value of the ration changed in about the 
same proportion as the amount of total nutrients, but not 
always. Occasionally quite a different relation was caused by 
the unusual proportion of fat existing in some of the grain 
products fed. At the time many of these records were made 
cottonseed meal and some gluten feeds contained over 18 per 
cent. of fat, gluten meals from 12 to 21 per cent., and the ground 
flaxseed about 38 per cent. 
