220 Pork Production 



for the purpose of marketing corn. Pigs intended for 

 following cattle during the winter ordinarily should not 

 be fed full rations in the summer. Also, the business of 

 producing feeder or stocker pigs has already developed 

 to some magnitude in localities which do not produce 

 much corn, but where suitable growing feeds are available. 

 Obviously the best practice for such conditions is to feed 

 only the amount of grain which will promote fair gains 

 and maintain thrift. Such conditions usually impose the 

 limited-feeding system. 



Pigs intended for the breeding herd 



In the feeding of market pigs, the objects are economy 

 and rapidity of production. In the feeding of pigs intended 

 for the breeding herd, the primary object is the produc- 

 tion of a strong well-balanced breeding development, with 

 size. Although economy of production is essential with 

 breeding as with market pigs, it is secondary in importance. 



Possible dangers from full feeding. 



The question of whether constitution and breeding 

 development are better promoted by full feeding on 

 forage, or by the use of limited grain rations, is one which 

 practical experience must be largely depended on to 

 answer. The central question is concerned with the 

 dangers which may attend full and unlimited grain feed- 

 ing, in excessive fatness, "blind" teats, broken-down 

 pasterns, and the failure to develop in a manner to insure 

 reliable breeding traits with approaching maturity. 



Conditions which affect the 'problem. 



Breeding gilts and young boars may be injured per- 

 manently by the practice of feeding full grain rations 



