THE SOW : StLECTIOX AND MANAGEMENT 



133 



giving 3 gallons of milk a day will give in the milk i 

 [)()und of fat and .yy pound of protein daily, while a 

 sow's milk will yield 1.26 pounds of fat and i.i pounds 

 of protein a day on an average. In composition sow's 

 milk in comparison with cow's milk is very high in total 

 fats as well as solids. Analyses made by Professor 

 F. W. \\o\\ at the ^\'isconsin experiment station give the 

 following comparison between sow's milk and cow's 

 milk : 



I'rom observations by Professor Henry as to the yield 

 and composition of sow's milk, it seems that in propor- 

 tion to their weight sows yield as large a quantity of milk 

 solids daily as a good cow. The average daily produc- 

 tion of milk solids per sow appeared to be about i pound, 

 or 4 pounds for four sows, tlie equivalent of the solids 

 in over 30 pounds of cow's milk of average quality. It 

 follows, therefore, that the demands upon the food for 

 milk formation are proportionately as heavy with swine 

 as with cows, and consequently the ration should be one 

 that will stimulate and sustain abundant milk secretion. 

 Such feeding is not only necessary, but economical, 

 "for," says W. H. Jordan, in "Feeding of Farm Ani- 

 mals," "independent experiments indicate that the food 



