6o8 



NUTRITION OF FARM ANIMALS 



of more ether-soluble excretory products in the feces of these 

 animals. The figures for the crude fiber of concentrates are 

 also materially lower with swine in some cases, but in others 

 equal to or even higher than those obtained for ruminants. In 

 view of the small percentage of crude fiber in the concentrates 

 and the corresponding range of possible error, however, the 

 results on this point are of little significance. The crude fiber 

 of roughage is but imperfectly digested by swine. Crude pro- 

 tein would appear, on the whole, to be rather more completely 

 digested by swine than by ruminants, possibly indicating the 

 presence of more nitrogenous excretory products in the feces 

 of the latter. 



717. Fowls compared with swine. Owing to the difficulty 

 of collecting the feces of fowls separately from the urine, com- 

 paratively few determinations upon these animals have been 

 made. Bartlett, 1 who has reported a number of such experi- 

 ments, gives the following as the average digestion coefficients 

 obtained in all recorded experiments up to 1910. 



TABLE 173. DIGESTIBILITY BY FOWLS 



Maine Expt. Sta., Bui. 184, 1910. 



