110 LAMENESS IN THE HORSE. 



to increase it. As a rule, lameness is present both when the 

 leg is carried forward and when supporting weight. The 

 leg is not properly extended, the posterior half of the 

 supporting leg is cut short, especially when anchylosis is 

 present. It is quickly carried forward with a jerk and a 

 conspicuous movement of the hip joint, there is more or less 

 a tendency to knuckle over at the fetlock and to walking on 

 the toe, which is usually excessively worn. Generally, 



Spavin 



Fig. 20. 

 Spavined Hock. 



lameness and the bony tumor appear together, yet either 

 one can be evident before the other one. The term " coarse 

 hock," so often employed to describe a want of symmetry of 

 the hock joint, shows that the mere fact of one joint being 

 of a different conformation from the other one, does not 

 entitle to diagnosis of spavin. For this reason any visible 

 difference in the two hock joints indicates either disease at 

 that moment, or at a previous time. 



