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HEALTH |
HIP
DYSPLASIA
A developmental disease of the hip joint, occurring primarily in
larger breeds (over 35lbs). It is caused by (1) increased joint laxity, (2)
abnormal contours of the ball/socket of the joint, or a combination of (1) and
(2). Whatever the causes, the result is excessive wear and tear within the
joint. Over time this leads to remodeling, as well as to the deposition of
arthritic tissue.
Symptoms of HIP DYSPLASIA vary from mild, transient lameness to
permanent crippling in severely affected dogs. Most experts hold this disease to
be of genetic origin, but its mode of inheritance is not yet firmly established.
It is thought that both environmental and nutritional factors play some part in
its origin. (ie. lack of proper nourishment during early puppyhood, overuse of
joint during growth - too much activity) Vitamin C is said to play a role in
preventing hip dysplasia - many breeders give high doses of Vitamin C to bitches
during pregnancy/lactation, as well as to the pups in liquid form. It is highly
recommended to give Vitamin C at least to 2 years of age.
X-rays can be done by most vets, and then sent to OVC (Ontario Veterinary College) or OFA (Orthopedic Foundation for Animals).
Minimum age for OVC certification is 18 months, or 24 months for OFA. These X-rays need to be done only once, because after growth is finished the hip joint does not change dramatically.
OVC clear hips are given written critiques on the hip placement, and OFA "clear" hips are given a rating of Fair, Good, or Excellent. (anything below Fair should be removed from a breeding program)
The newest method is Penn HIP, and can be done as early as 16 weeks. Some believe this to be the best method, whereas others feel the dog is best rated once it has finished growth (ie. 2 years).
HIP DYSPLASIA can be carried, so even a “clear” dog can produce affected puppies. An affected dog should never be used in a breeding program.
Orthopedic Foundation for Animals - Hip Dysplasia Information
Dr. Wendell Belfield's: CHD and Vitamin C and Changing the Concept of CHD
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