Hip and Elbow Dysplasia
Hip Dysplasia afflicts millions of dogs each year and can result in debilitating orthopaedic disease of the hip. It is caused when the femoral head does not fit properly in the hip socket, causing instability of the joint. Over time, this malformation can cause degenerative joint disease which causes increased pain and immobility.
Elbow Dysplasia may be due to different growth rates of the three bones making up the elbow. In affected dogs, the joint is lax or loose and, in mildly affected dogs, leads to painful arthritis. Severely affected dogs can develop osteochondritis dissecans (OCD), fragmented medial coronoid processes and united anconeal processes resulting from the stress in the joint.
Full information can be found at this link Pet Education - Hip Dysplasia.