428 Pork Production 



must conform to the official standard for the individuals, 

 in color (not less than 20 or more than 80 per cent black) , 

 size, form, and quality. 



The aim of the present day breeders is to maintain and 

 improve on the virtues of the old Spotted Poland-China. 

 During the last few years, the breed has grown rapidly 

 in numbers and popularity and the herds have become 

 more uniform in type. With the utility type the standard 

 and cooperation and unity of purpose among the breeders 

 the rule, the future for the breed appears bright. 



THE LARGE YORKSHIRE (PLATE Xl) 



This English bacon breed had its origin in Yorkshire 

 and neighboring counties of England nearly a century ago. 

 The early foundation stock consisted of large white hogs 

 with black or bluish spots on the skin, with heavy bone, 

 very large drooping ears, long legs, and narrow backs and 

 loins. This stock is said to have been improved by the 

 use of some Berkshire blood as early as 1842, and later, 

 of white Leicester hogs. These latter were large, but fine 

 of head and bone, and with erect ears. To improve their 

 fattening qualities, boars of the Small Yorkshire breed 

 were also used. 



Yorkshires were imported into the United States at a 

 comparatively early date, but have never become widely 

 distributed since they are better adapted to bacon than 

 to lard production. In Canada where the bacon type of 

 hog predominates, the Yorkshire has become the standard 

 breed. Most of the herds in this country are foutid in 

 Minnesota and other small-grain growing sections. 



In addition to its bacon type, the predominating char- 

 acteristics of this breed are its large size and the unusual 



