DISEASES OF HORSES AND CATTLE. 205 



ounce, tincture of arnica two ounces, water one 

 quart. If matter forms open the part and clean 

 out well with carbolic acid one dram, water half 

 a pint. Usually if matter forms at the fractured 

 part it will be best to destroy the animal. 



Dislocation of the Patella (Stifle Bone).— This 

 occurs most frequently among young horses and 

 colts. In some colts the muscles attached to this 

 bone become relaxed and allow the patella to slip 

 out and in at every step with a clicking sound. 



PLATE 4. DISLOCATION OF THE PATELLA 

 (STIFLE). 



Very commonly both patellas will be in the same 

 condition. 



Causes of dislocation of the patella are slipping 

 on rising in the stall, or the animal starting, sud- 

 denly and the hind leg slipping too far forward, 

 thus slackening the muscles of the stifle too much 

 and allowing the bone to slip off. It may also be 

 caused by cramps of the muscles of the outside of 

 the stifle. 



Symptoms of dislocation of the stifle : The horse 

 stands with its affected leg stretched out back- 



