FEEDING SWINE 297 
The greater economy of young growing pigs as compared with 
older ones for making gains from a given amount of feed is plainly 
seen from this table. While pigs of less than 50 pounds live weight 
required only 293 pounds of feed per 100 pounds gain, pigs weigh- 
ing 150 to 200 pounds required 482 pounds, and hogs weighing 
over 300 pounds required 535 pounds per 100 pounds gain. This 
difference does not represent one of actual feed value in the 
products, however, as the carcass of the mature hog contains more 
dry matter and more fat than that of young animals, but the feeder 
selling young animals has the benefit of the situation, as he is 
paid for the total weight furnished, and not only for the dry matter 
or edible portion of the carcass. 
Fig. 73.—Well-fed, busy youngsters that will grow into good porkers. (Henry.) 
Results similar to those shown in the preceding table were ob- 
tained in the extensive swine-feeding experiments conducted at the 
Copenhagen station during the nineties.* In these trials it required, 
on the average, 376 feed units to produce 100 pounds of gain with 
pigs weighing from 35 to 75 pounds each, and 639 pounds with hogs 
of 275 to 315 pounds weight, there being a gradual increase from the 
former to the latter figure with increasing weights of animals fed. 
Preparation of Feed for Swine.—It has been shown that the 
digestibility of feeding stuffs is not, as a rule, materially altered by 
different methods of preparation, like cooking, cutting, grinding, 
rolling, etc. (p. 67). In view of the special importance of this 
8 Report 30, 1895; Exp. Sta. Record 7, p. 245, 
