392 The Diseases of Animals 
access to mineral substances, such as wood ashes, slack 
coal, salt and sulfur. These ingredients can be mixed 
and placed where the hogs can get at them. Stock 
hogs need exercise and a run on pasture, where they 
ean get green food and come in contact with fresh 
earth. Dish-water and swill from the farmhouse are 
excellent, but garbage and city slops should be used 
with caution, as they often contain large quantities of 
soap powders and other materials that are injurious 
when fed freely. 
Hog cholera oceurs sometimes in a mild form, but 
often in a virulent and fatal type. In the latter type, 
the first indication of the disease is finding a dead 
animal; or an animal noticed to be ailing in the 
evening will be found dead the next morning. If the 
disease is of a milder type, or if the conditions are 
favorable to watching its progress, the following symp- 
toms will be noticed: The animal first appears dull 
and quivering, showing a tendency to hide away in the 
bed, and to shiver as it lies there. It evinces a dislike 
to be disturbed, and when driven from its bed moves 
stiffly, and is likely to cough and sneeze. Sick pigs 
show a tendency to wander away, often long distances. 
There is a rise of temperature in the early stages of 
the disease, before the physical symptoms appear, the 
temperature rising from 103° F., or thereabouts, to 107°. 
There seems, to the writer, to be a characteristic odor 
to the disease that is quite pronounced, but difficult to 
describe. 
The following description of the symptoms, by the 
Iowa State Board of Health, is excellent: “The pres- 
