98 Report of Department of Animal IIusbaxdry of thb 



Tahlk XX[. — Little Chaxgk ix the Amount oi- Protkin. 



Avempje of 91 rec- 

 ords from cows 

 ca V e r ii y; i II f; 4.5 

 yrs. old and 4.9 

 munths iu milk. 





Before 



-g After 



o 



-*^ ~z 



~ ■— ( 



'^ n Before 



u 5 



Pi, After 



Fob 1000 Lbs. Live Weight. 



Total 

 dgest- 

 ible or- 

 ganic 

 matter. 



i6s. 



14.6 

 15.5 



Fat iu 

 milk. 



Per of. 

 4.3 



4.4 



i>>le 

 pro- 

 tein. 



Lbs. 

 2.01 



2.03 



Fuel 

 value. 



Cat. 

 28,813 



31,611 



Nutri- 

 tive 

 ratio. 



AvERAOK Per 

 Day Per Cow. 



Milk 

 yield. 



1:6.8 



1:7.5 



Lbs. 

 21.1 



20.7 



Fat In 

 milk. 



Lbs. 



.91 

 .91 



Dry 

 matter in 

 food for 



line II). 



of milk 

 solids. 



Lbs. 

 6.9 



7.5 



Digest- 

 ible dry 

 jnatter in 

 food for 

 each lb. 

 of milk, 

 solids. 



Lbs. 



4 6 

 5.0 



AN INCREASE OP PROTEIN. 



The nvornffo of 273 records, eacli of wliicli covers a period 

 when the amount of protein in the ration was increased, is 

 sho^'h in Table XXII. There was, on the average, also a slight 

 increase in fuel value. The shrinkage in milk flow was about 

 half as great as would normally occur. The very moderate rate 

 of gain in live weight was somewhat increased by the change. 



