DISEASES OF FARM ANIMALS I93 



Vaccination Does Not Spread Cholera. — Every in- 

 telligent stockman who reads this will probably ask 

 if there is not danger of scattering cholera by this 

 simultaneous vaccination into districts where it 

 has not yet appeared. A considerable amount of 

 direct evidence on this point is better than any 

 amount of theorizing and personal opinions. This 

 evidence all agrees that unless the vaccinated hogs 

 become distinctly sick as a result of the vaccina- 

 tion (which can occur, and does very often), that 

 there is practically no danger of disseminating the 

 disease. This is especially true since all hogs on 

 the farm are supposed to have been treated and are 

 immune, and, therefore, incapable of developing 

 cholera and so spreading the disease. It does occur, 

 even with good serum, perhaps, that an occasional 

 hog may become a little sick, and very rarely even 

 die, as a result of vaccination. But with good serum 

 given in standard dose and virulent blood also given 

 in proper dose, the risk of this is so small that it 

 may be safely disregarded and especially when all 

 hogs on the farm or that may be exposed with such 

 sick hogs have been treated. 



HOLLOW HORN. — ^A common term to denote a 

 diseased condition of the blood. The horn is not 

 hollow and never is. The old quack method of 

 boring a hole in the horn with a gimlet and squirt- 

 ing turpentine into the orifice is both cruel and 

 ridiculous. While in fact the temperature of the 

 horn is low, it is because of the general poverty 

 of the blood of the animal. There is no merit in 

 this kind of treatment. The most common symp- 

 toms are general debility, scanty flesh, scurvy coat 

 and coarse hair. The appetite is also irregular and 

 at times greedy. Treatment is in line of better 

 food and general improvement of the system. If 



