22 SWINE PEACTKIK 



rainy or cold weather, ample bedding should be provided and the 

 hogs kept in dry, protected quarters. During the grass season, if 

 it is possible the hogs should be turned on pasture. 



SUCCESS DEPENDS ON FEEDING 



The feeding of recently immunized, shipped stock hogs is of vital 

 importance and the handling during this stage frequently determines 

 \vhether or not the shipper will be successful or lose money on the 

 venture. Such hogs should receive a small ration not to exceed 

 one-half of the usual feed and it should be of a good quality. This 

 half ration should be maintained for a period of a week or ten days; 

 in fact, the hogs should not be gi^'eu full feed for two weeks and 

 even longer if there is any indication of disease in the animals. 



Should any evidence of disease of any character develop a careful 

 examination should be made to determine what the condition is, in 

 order that preventive measures may be established at once and to 

 prohibit extensive losses. The diseases to which swine are most 

 subject after immunization are hog cholera, infectious pneumonia 

 or swine plague and infectious necrotic enteritis. Eelatively few 

 immunized stock hogs die of cliolera, because the government regu- 

 lations require that stock hogs be immunized with serum and virus 

 made in establishments that are under government supervision and 

 the immunization of stock hogs is under the direct supervision of 

 one or more government veterinarians. Losses occur ing from cholera 

 due to impotent serum will occur in from the tenth to fifteenth day 

 after immunization. Such conditions are usiially manifested by a 

 large percentage of the hogs showing evidence of disease at once. It 

 is extremely diiScult for a veterinarian to make a positive diagnosis 

 of cholera in recently immunized hogs because the lesions attributed 

 to hog cholera are also found in hogs that have been simultaneously 

 immunized. The veterinarian should therefore be on his guard in 

 making an examination of diseased conditions in stock hogs. 



Infectious pneumonia or swine plague is probal)ly responsible for 

 a large percentage of the losses that occur in stock hogs, and the losses 

 due to this disease usually occur in from twenty to thirty days after 

 the hogs are purchased. This loss may occur in hogs that have 

 received the swine plague bacterin, because one injection of the bac- 

 terin produces an immunity of relatively short duration and, there- 

 fore, it is always advisable, particularly during changeable weather, 

 to give a second injection of the swine plague bacterin a few davs 



