BVA / Kennel Club hip dysplasia scheme
Hip dysplasia (HD) is a condition of the hip joint characterized by instability of the joint. It is generally considered that puppies are born with a normal conformation of the joint but that laxity or instability of the joint develops early in life. The mechanism for the development of laxity is largely genetically mediated but is influenced by environmental factors. These include the size and breed of the dog, its rate of growth, type of feeding, and the type and duration of exercise.