
As you can see from the drawing above, the bones and angulation of the rear balance
those of the forequarters. The articulation of the upper thigh (femur) and lower thigh
(tibia and fibula) is the stifle, or knee joint. In a properly constructed Scottish
Terrier, the angle of the stifle is about 90 degrees.
Viewed from the side, and standing naturally (as opposed to the overextended rear seen
in nearly all show photos), the dog should stand so that a line drawn the point of
buttocks would just touch the back line of the hocks. Dogs whose legs naturally extend
farther back than this or dogs with hocks set too far under the body lack the required
drive and power in the rear. The two dogs immediately below have correct rears.

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