5QO NUTRITION OF FARM ANIMALS 



for this purpose, and it has also been dried together with the 

 beet pulp, forming molasses pulp. All these feeds are of value 

 in proportion to the materials out of which they are made. 



699. By-products of the packing house. The slaughtering 

 of meat animals on a large scale in the modern packing house 

 yields a number of highly nitrogenous by-products which are of 

 especial value in the feeding of swine and poultry. 



Dried blood is especially rich in protein, of which it contains 

 over 80 %, practically all of which is digestible. It contains a 

 small amount of fat and but little ash. 



Tankage consists essentially of the residue left after the 

 rendering of the meat scraps, trimmings and scrap bones of 

 the packing house. Tankage contains much less protein than 

 dried blood but, on the other hand, contains a considerable per- 

 centage of fat, while the bone which it contains renders it rela- 

 tively rich in ash ingredients, especially calcium and phos- 

 phorus. As is obvious from the method of its manufacture, 

 tankage is likely to vary widely in composition and should 

 always be bought on a guarantee. 



