Preparation of Feeds 341 



5. Corn and cob-meal (ground ear-corn) is too bulky 

 and hard to digest to make it at all suitable for growing 

 or fattening pigs. 



6. In general, pigs experience a temporary check in 

 gains when for any reason a change is made from soaked 

 or ground corn to ear-corn. 



The actual estimated cost of shelling and grinding a 

 bushel of corn at the Iowa Station 1 in 1907 and 1908 was 

 as follows : for shelling, 1 cent ; for shelling and grinding, 

 3 cents; for grinding fine corn and cob-meal, 6 cents. 

 The charge made by mills for shelling and grinding corn 

 at the present time (1918) is around 10 cents a bushel. 



SMALL GRAINS 



Grinding and soaking. 



When wheat, oats, rye, barley, kafir, milo, and other 

 small grains are fed to pigs unground, a larger proportion 

 passes through undigested than when whole corn is fed. 

 For this reason and also because the whole small grains 

 are not eaten with relish, experiments generally show a 

 very much larger saving from grinding small grains than 

 from grinding corn. In fact when grinding is at all 

 possible, small grains should not, as a rule, be fed in any 

 other condition. The ground grains may be expected 

 to give better results, also, when given wet or soaked 

 than when fed dry. When grinding is not possible, 

 small hard grains should be soaked for at least twelve 

 hours. 



These general conclusions are based on the results of 

 feeding tests conducted at the various experiment stations 

 of this country and Canada. After a thorough compila- 



i Bull. 106. 



