FEEDING FOR MEAT 385 



Digestible matter required 

 for 1 pound of gain 

 Combination Po 



Mixed grains alone 

 1 lb. com meal to 1-3 lbs. skim-milk 

 1 lb. com meal to 3-5 lbs. skim-milk 

 1 lb. com meal to 5-7 lbs. skim-mUk 

 1 lb. com meal to 7-9 lbs. skim-milk 



Pounds 

 3.9 

 3. 

 3.1 

 3.3 

 3.2 



These results show the greatest food eflSciency with 

 the minimum proportion of skim-milk. Other experi- 

 ments, notably those by Linfield and Robertson, give 

 similar testimony. With the former, in seven experi- 

 ments, a mUk and grain ration produced 1 pound of 

 gain for each 2.58 pounds of digestible matter, the re- 

 quirement with mDk alone being 2.85 pounds and with 

 grain alone 3.19 poimds. When 2 pounds of skim-milk 

 was fed with 1 poimd of grain, 100 pounds of the milk 

 replaced 31 pounds of grain, but when the milk and grain 

 were as 4 to 1, 100 pounds of milk replaced only 24 

 pounds of grain. 



Doubtless with pigs in the earliest stages of growth 

 after weaning, the proportion of milk to grain may well b6 

 larger than in the more mature periods, and in any case 

 the ratio will naturally depend somewhat on the relative 

 supply of the milk and grains. 



479. Protein foods other than milk products for 

 swine. — In the absence of dairy wastes, meat meal, dried 

 blood, and fish scraps may be used to supplement the 

 grain products or a mixture of the more nitrogenous 

 feeding-stuffs with corn and barley will be found greatly 

 superior to the corn or barley alone. Milk is more efficient 

 with young pigs than the grain feeds rich in protein, but 

 in the maturer periods the digestible matter of certain 

 ■ of the latter seems to have a value not greatly, if any, 

 below that of skim-milk solids. 



