HANDLING HOG CHOLERA IN THE FIELD 189 



The common tendency is to estimate weights of 

 swine far too low, and this should be thought of 

 in connection with every serum order. 



Before the list is completed the final question, 

 "Have you any other hogs?" should always be 

 asked, for it is very annoying and very common to 

 find, even after we reach a farm to do the immun- 

 izing, that the owner has hogs which he has not 

 mentioned because he "hadn't thought of having 

 them immunized. " If a simultaneous treatment 

 is to be given to any of the hogs in a herd, the 

 remainder must not go long without some kind 

 of immunization, and lack of sufficient serum to 

 treat an entire herd may often postpone the date 

 of treatment or necessitate a second call. 



When all of the hogs that are in the herd are 

 listed, the veterinarian can estimate the quantity 

 of serum and virus required, provided he has a 

 dose table from the laboratory he patronizes. 

 Lacking this, he should send in the list and allow 

 the laboratory to make the estimate. 



Telegrams or letters containing orders such as 

 "Serum and virus for 20 swine " or "Serum to 

 treat a mixed bunch of 100 sows, pigs and shoats ' ' 

 are not sufficient. Every order should state the 

 required quantity of each product, or it should 

 include a list of the number of hogs and their 

 approximate weights. 



