THE PACKINGHOUSE BY-PRODUCTS 21% 



more economical for hog feeding, as blood meal is quite 

 expensive. A teaspoonful may be fed in the milk of the 

 skim milk calf at weaning and this amount gradually in- 

 creased. It will have a tendency to prevent scours. It also 

 has been fed to lambs. 



Blood flour is finely ground blood meal. There is no 

 difference in chemical composition or in feeding value, 

 although blood flour usually sells for more on the market. 



Meat scraps consist largely of beef trimmings which are 

 cooked in large open vats in the presence of grease for the 

 purpose of liberating all the grease possible. The resulting 

 cracklings are then subjected to heavy pressure to remove the 

 grease and water. The cakes are then ground and bagged. 

 Meat scraps contain about 50 per cent protein. They are 

 used for poultry feeding. 



Cracklings are the residues left from the manufacture of 

 lard and tallow. Although they are not regularly listed on 

 the market as a feedingstuff, they often may be obtained 

 from local slaughter houses at a low price. They are as 

 high in crude protein as tankage and contain considerably 

 more fat. Digestion experiments by Dietrich and Grindley 

 at the lUinois Experiment Station ^ showed that crackhngs 

 were considerably more digestible than tankage. For hogs, 

 good cracklings should be at least as valuable as tankage. 

 They are also very good for poultry. 



Raw bone meal, as the name implies, consists of ground 

 bone. It is made from clean, sound bones from healthy 

 animals. It is high in protein and very high in ash. It is 

 used especially for hogs and poultry to furnish additional 

 mineral matter to the ration. A little may be given to other 



1 Bui. 170. 



