Canine Hip Dysplasia
Canine Hip Dysplasia (CHD) is the most common, heritable orthopedic problem seen in dogs. It afflicts virtually all breeds of dogs but is especially problematic in large and giant breeds. Clinically, the disease manifests itself in one of two ways: 1) a severe form that typically afflicts the younger animal and is usually characterized by marked pain and lameness, or 2) a more chronic form with more gradual onset of clinical signs such as mild, intermittent pain, stiffness and restricted range of motion in the hips as the dog ages. In many cases, the chronic form may be clinically silent.
More on Hip Dysplasia
For pictures of good hips and bad hips.