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Rear Movement Faults
When moving close, the fore or hind limbs are insufficiently well separated from each other during movement, and, in extreme cases the legs may interfere by brushing up against one another along their inner borders.
Movement fault 1
Front Hackney Gait & Rear Piston Action
In order to keep the paws out of the way of the oncoming back feet the dog is forced to resort to extra high action of the forelegs.
Hackney action is caused by more angulations and drive from behind than in front.
Correct gait for the Miniature Pincher, however it is abnormal movement that requires rather steep shoulder angulations, coupled with upright pasterns.
Movement fault 2
GOOSE STEPPING
Faulty in any breed.
Goose stepping is a movement typified by accentuated lift of the forelimbs, similar in most respects to a hackney gait but coupled with full extension of the front pasterns and feet before placing them in contact with the ground.
The dog seems to have good reach, but close observation will reveal that the actual front foot contact with the ground is delayed, and therefore the effective reach is considerably shorter.
Over Reaching
Observable in profile and especially when moving fast, in which the hind feet are thrust past their front counterparts.
Overreaching at the front is a common faults.
Caused by more angulations and drive from behind than in the front.
So that the rear feet are forced to step to one side of the front feet to avoid interference or clipping.
This is one of the many forms of poor foot timing, but it must not be confused with the natural overreach in the suspension trot, or the canter or gallop.
Lack of Reach (movement fault 4)
A dog with a shortened stride has poor angulations because the bones meeting at the shoulders and hips are steeply set, forming joints with wide angles.
Side Movement Faults
See pictures+
Ideal Moving Front
The American Hairless Terrier moves with a jaunty air that suggests agility, speed and power.
The gait is smooth and effortless, with good reach of forequarters without any trace of hackney gait.
Viewed from any position, legs turn neither in nor out, nor do feet cross or interfere with each other.
As speed increases, feet tend to converge toward the center line of balance.
This better demonstrates the action of the muscles and bones in the shoulder area as the leg moves accordingly.
Ideal Moving Rear
-Rear quarters have strong driving power, with hocks fully extending.
-Viewed from any position, legs turn neither in nor out, nor do feet cross or interfere with each other.
-As speed increases, feet tend to converge toward the center line in balance.
-Same rear movement with boxes and lines over it showing the straight column and "landing points".
-The foot fall depicts the dog moving at a medium trot with the fall converging toward the center line at the closest point of fall.
IDEAL MOVING BEACH
-Whether the dog is standing or moving, the line of the back is strong and level.
-A dog with good angles and balance will have joints that flex easily and smoothly, providing strong thrust from the rear and spring and resilience in the front.
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