Hip dysplasia is a common disorder in domestic dogs that involves abnormal development and/or degeneration of the coxofemoral (hip) joint.
Genetics almost certainly influence the occurrence of hip dysplasia in dogs, although the exact contribution of genetics is unclear. A combination of complex hereditary and environmental factors probably leads to looseness (laxity) of the hip joint, which in turn causes that joint to become unstable and accelerates the progressive degeneration of bone and cartilage.
signs and symptoms:
For smaller dogs, yowling or grumbling when lifted or handled
Increased sensitivity to touch
A marked change of behaviour
A lack of motivation to move
Difficulty getting up from a lying or sitting position
While moving, moving both rear legs in unison
Difficulty climbing stairs
A painful or violent reaction to an extension of their rear legs
Whining or making noises for no other reason