THE FEED REQUIREMENTS OF FARM ANIMALS 137 



Dietrich ^ recommends the standard for fattening market 

 hogs given in Table 14. 



Table 14. — Requirements of Fattening Hogs (Dietrich) 



According to Dietrich they should have 2.4 lb. of digestible 

 carbohydrates per 100 pounds live weight at the beginning 

 of the feeding period. This amount is increased gradually to 

 2.8 pounds. After this they are kept just below full-feed. A 

 little more fat than is found in the ordinary farm rations is 

 recommended by Dietrich. 



As in the case of fattening cattle and sheep, the protein 

 requirements of the Wolff-Lehmann standard for fattening 

 hogs are too high. Their protein requirement for growing 

 breeding stock, and the amounts of carbohydrates and fat 

 as prescribed by their standard for growing and fattening 

 hogs probably represent approximately the requirements of 

 fattening hogs. The Henry-Morrison standards for fatten- 

 ing pigs also are quite valuable. 



Requirements for Work. — The idea of the early investiga- 

 tors in animal nutrition was that the protein was the source 

 of muscular work, consequently the old standards, such as 

 the Wolff-Lehmann, are too high in this nutrient. Inasmuch 



1 in. Agr. Exp. Sta. Cir. 126, 133, and 153. 



