80 PRINCirLES OF FEEDING FARM ANIMALS 



were l^rokeii and then healed again. Also the ration of 

 growing colts fed on corn and timothy hay is liable to be 

 deficient in calcium. Sometimes the ration of the dairv cow 



I'KJ. 15. — Abnormal bones from hogs whose rations were low in cac m 

 (corn alone, and corn and soy beans). The bones seem to have l/oc.i 

 broken and to have healed again. (Ohio Experiment Station.) 



is deficient in mineral matter, owing to the large amount of 

 it required for milk production. 



Functions of Crude Protein. — The functions of the 

 proteins of the ration are as follows: (1) they serve as 

 material for the repair and growth of the proteins of the 

 tissues and fluids of th(^ body, for foetal development in 

 the i^regnant animal, and for milk production in the milk- 

 producing animal ; (2) they may serve as a source of energy ; 



