The illustration on the right is a photograph of the hind quarter of ST. 

 SAVIOUR, a thoroughbred stallion, showing a clean, strong hock and properly 

 set hind leg. The photograph on the left shows a curb on the right leg due 

 to a weakly supported hock also improperly set. 



The left illustration shows a hind leg too straight, while the right one 

 shows the other extreme in being set too far back. 



