312 PRODUCTIVE FEEDING OF FARM ANIMALS 



kind of grain fed with it will vary according to the character of the 

 available green feed; with leguminous crops the grain may consist 

 of corn or barley, preferably soaked or ground with a little tankage. 

 If green corn, rape, or sorghum forage is fed, more nitrogenous 

 feed mixtures must be supplied ; skim milk and tankage are the best 

 supplementary feeds with the cereals and mill feeds. Cotton-seed 

 meal is fed considerably in the South to fattening hogs with corn 

 or other grain, but fatal results often follow on account of the 

 poisonous principles found therein (p. 200). If the animals are to 

 be fed not more than twenty-one days in the finishing period after 

 pasturage or running with steers, one-third of the total grain ration 

 may be made up of cotton-seed meal; if it is likely to extend 

 beyond twenty-one days, the proportion of cotton-seed meal must 

 be reduced to one-fifth or one-sixth of the whole ration and the finish- 

 ing period be limited to five weeks in all. 19 



FIG. 85. The self-feeder saves labor in feeding pigs and other farm animals. The 

 large self-feeder is used for different grain feeds, and the small one for feeding charcoal, 

 ashes, and lime. 



The Use of Self-feeder. The self-feeder (Figs. 85 and 86) 

 has been used to a limited extent in feeding fattening swine, for 

 feeding grain or salt, charcoal, etc., and has given similar results, 

 as previously stated, in the case of steers and sheep. 20 A patented 

 " hog motor grinder," by which the pigs grind their own corn as 

 wanted, is a special form of self-feeder. In two trials at the Mary- 

 land station 21 it produced good results, but not quite as economical 

 gains as hopper feeding. 



19 Farmers' Bulletin 411. 



30 Maryland Bulletin 150; Wisconsin Agriculturist, Sept. 17, 1914* 



* Bulletin 150 ; Day, "Productive Swine Husbandry," p. 208, 



