90 DISEASES OF SWINE 



a suitable ration, and keeping the hog in clean, well- 

 ventilated quarters, where it can get plenty of exer- 

 cise. Salt and charcoal are valuable additions to a 

 growing pig's ration. Whenever a litter or several 



FIG. II — ^RHACHITIC SWELLINGS ON THE HOCK JOINTS OF A PIG 



individuals in the herd show symptoms of the dis- 

 ease, the character of the ration should be looked 

 into, and, if faulty, corrected by adding to it food 

 containing the required elements. 



It is hardly practical to use medicinal treatment 

 other than bitter tonics. Unless it is in advanced 

 cases, the disease can be controlled by feeding a 

 ration rich in inorganic substances, and good hygienic 

 conditions. 



