182 HOG CHOLERA 



with which they come in contact after they reach 

 their various destinations. 



Those who follow the practice are merely lucky 

 if they do not sustain heavy losses because they 

 continually ignore the fact that a reaction nor- 

 mally follows simultaneous treatment, and that 

 shipping lowers the resistance of hogs to such 

 an extent that the reaction may prove fatal. 

 When we add to the effects of shipping and simul- 

 taneous treatment those incident to a brief or 

 prolonged .stay in infected yards before the treat- 

 ment is administered, as well as those that grow 

 out of injudicious feeding and watering when the 

 animals reach the end of a journey, fatigued, hun- 

 gry, and thirsty, we have a chain of devitalizing 

 influences that often cause disaster. 



It is well known also that many swine unloaded 

 at stockyards do not leave home free from dis- 

 ease. Oftentimes a consignment of hogs repre- 

 sents a breeder's final determination to "cash in" 

 on a herd that is badly infested with parasites, 

 that is suffering with some obscure respiratory 

 disease, or one that has recently contracted hog 

 cholera. Despite the fact that apparently well 

 animals are selected from such herds for shipping 

 each animal selected is potentially the source of 

 future trouble. What is one to expect if in pur- 

 chasing hogs for the feed-yard he chances to in- 

 clude even a few individuals of this kind? The 



