Hip Rating Comparison Chart
This chart below is an image so you may have to scroll back and forth to see the
relationship between the scoring systems of different countries.
- The old UK system is included since many ASD owners have dogs whose hip ratings trace
back to the old rating scheme.
- Other Countries:
CH= Switzerland (Confederatio Helvetica)
- Spain uses the German rating - A,B,C
Their breeding rules for Pyrs, for example: To be considered a "club approved
a C rated hip to be bred only to an A
a B may be bred to B or A
an A may be bred to A,B or C.
Each hip is rated separately.
For a dog to be considered a "top producer" it must have three x-rayed offspring
who rate A,B or C and who rate Excellent in an "Exposition Monografia" (thanks
Catherine de la Cruz, for the interpretation)
Below this chart are the FCI definitions for their lettering scheme.
FCI HD Classification: Dortmund 1991
This classification has been made up on account of the radiological
features only. It is as objective as possible. This classification scheme may be adopted
for older dogs, but secondary arthrotic changes have then to be evaluated according to the
age of the dog.
- No signs of Hip Dysplasia
- The femoral head and the acetabulum are congruent. The craniolateral rim appears sharp
and slightly rounded. The joint space is narrow and even. The acetabular angle according
to Norberg (adapted for Pos. I) is about 105 degrees (as a reference). In excellent hip
joints the craniolateral rim encircles the femoral head somewhat more in laterocaudal
- Near normal hip joints
- The femoral head and the acetabulum are slightly incongruent and the acetabular angle
according to Norberg (adapted for Pos. I) is about 105 degrees or the center of the
femoral head lies medial to the dorsal rim of the acetabulum and the femoral head and the
acetabulum are congruent.
- Mild hip dysplasia
- The femoral head and the acetabulum are incongruent, the acetabular angle according to
Norberg is about 100 degrees and/or there is a slightly flattened cranilateral rim.
Irregularities or no more than slight signs of osteoarthrotic changes on the margo
acetabularis cranialis caudalis or dorsalis or on the femoral head and neck may be
- Moderate hip dysplasia
- Obvious incongruiency between the femoral head and the acetabulum with subluxation.
Acetabular angle according to Norberg more than 90 degrees (only as a reference).
Flattening of the cranilateral rim and/or osteoarthrotic signs.
- Severe Hip Dysplasia
- Marked dysplastic changes of the hip joints, such as luxation or distinct subluxation,
acetabular angle according to Norberg less than 90 degree, obvious flattenting of the
margo acetabularis cranialis, deformation of the femoral head (mushroom shaped,
flattening) or other signs of osteoarthriosis.
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