240 Diseases of the Horse. 



Causes. — These, in nearly all instances, are wounds and 

 injuries of some kind, or the result of the very severe inflam- 

 mation which follows them. Thus the bone is liable to 

 decay in founder, poll evil, after severe kicks, cracked or 

 fractured bones, etc. 



S3^ptoms. — Severe and painful inflammation in the part 

 is followed by one or several abscesses, which break but do 

 not heal, remaining as fistulas. The discharge at first may be 

 odorless, but after a time gives off a peculiar and very fetid 

 odor, easily recognized by one familiar with it, as proceeding 

 from decaying bone. If a probe is carefully inserted into 

 the fistula, and made to follow its course, it will reach the 

 decayed bone, and give a dry grating feel to the finger. 



Treatment. — The most prompt treatment of necrosis, 

 when it is in a position to permit of it conveniently, is to cut 

 freely down upon the decayed bone, scrape it clean with a 

 scraper, remove all loose pieces, wash the wound with car- 

 bolic acid water or De Morgan's chloride of zinc lotion 

 (No. 217), and treat the cut like any other wound. 



This cannot always be done, for various reasons, and then 

 the next best procedure is to open the fistulas so as to admit 

 of throwing injections to their bottom, and wash them out 

 once a day, for a week or two, with "Yillate's Solution.^' 



No. 262. Sulphate of zinc, 



Sulphate of copper, each, J oz. 



Solution of subacetate of lead, 1 oz. 



White wine vinegar, 6 ozs. 



Use one part of this to ten of water, bj means of a syringe. 



The upper and lower jaws, from their exposed situation, 

 and from the abuse of the bit with long levers, and from in- 

 juries to the teeth, and also the roof of the mouth, are parts 

 especially liable to caries, the ulcers being inside the mouth. 

 The sore caused is characteristic' There is a depression, in- 

 dicating a loss of substance, which contains a fungous growth 



