314 PRODUCTIVE FEEDING OF FARM ANIMALS 
In the open winter quarters the pigs ate 526 pounds grain per 100 
pounds gain, against 366 pounds for those in the piggery, a differ- 
ence of 44 per cent in favor of the latter quarters. Brood sows in 
similar colony houses required only 25 per cent more, a figure which 
corresponds closely to that obtained in trials at the Kansas Agri- 
cultural College ** (Fig. 84). 
Feeding for Bacon Production.—Bacon hogs are kept only 
to a relatively small extent in the United States, but the raising 
of such hogs and the production of a high quality of bacon are 
important special industries in Canada and northern Europe, es- 
pecially in Ireland and Denmark. The bacon found on the market 
Fic. 86.—A convenient self-feeder for supplying charcoal and mineral matter to pigs on 
pasture. (Breeders’ Gazette.) 
in this country is largely the sides of lard hogs and has an inferior 
grade of meat. The special breeds of bacon hogs are best adapted 
to the production of good bacon, having a larger body and legs, less 
thickness and depth of body, and being lighter in shoulder, neck 
and jowl. There is less accumulation of fat and more lean and firm 
meat than on the lard hog. While the latter hog is essentially a 
product of corn, the bacon hog is produced where dairy products, 
small grains, and leguminous feeds are readily available; hence we 
find some hogs of this type in eastern and northern States where 
favorable feeding conditions exist for bacon production, and there 
is apparently an increasing home demand for ‘all bacon that is 
produced in this country. Bacon hogs are marketed at about 200 
* Report Prof. Agr., 1883, 
