70 



DISEASES OF 



Fig. 2f>. Coffin bone showing Bide- bones at A. A. 



SIDEBONE OSSIFICATION OF THE LATERAL 

 CARTILAGES. 



AT A. A. in Fig. 26 is seen the side bones which have 

 taken the place of the cartilages; at B. is situated the 

 coffin bone. 



This is a disease that usually attacks the fore feet, 

 and most frequently in heavy made horses. The change 

 that takes place in the lateral cartilages, by which they 

 are transformed into bone, is commonly a very slow one ; 

 in fact, takes place so slowly that no pain is felt and no 

 lameness is noticed during development. At times 

 however, the change is more rapid and inflammatory in 

 its nature, and lameness becomes quite pronounced. 



Causes Inheritance, hard work at a very early age 

 (principally drawing heavy weights), and active concus- 

 sion. 



Symptoms. The sure sign is that the usually elastic 



