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.?® 
Fic. 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—tThe self-feeder (Figs. 85 and 86) 
has been used to a limited extent in feeding fattening swine, for 
feeding grain or salt, charcoal, ete., and has given similar results, 
as previously stated, in the case of steers and sheep.?? 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 7? it produced good results, but not quite as economical 
gains as hopper feeding. 
* Farmers’ Bulletin 411. 
” Maryland Bulletin 150; Wisconsin Agriculturist, Sept. 17, 1914. 
* Bulletin 150; Day, “ Productive Swine Husbandry,” p. 208. 
