Luxating Patella (Patellar Luxation) is a condition in which the patella (kneecap), dislocates or moves out of its normal location.
It is a common condition in dogs, particularly small and miniature breeds. although dogs of all breeds and sizes can also be affected.
Most start to show signs as puppies or young adults, although onset of signs in mature dogs is also common. Animals with a “bow-legged” stance are more likely to be affected by patellar luxation. A characteristic “skipping” lameness is often seen, where animals will limp for a few steps and then quickly return to normal. Some animals will limp continuously and some dogs affected by patellar luxation in both knees will have a stiff, awkward gait with knees that do not extend properly.
The condition is primarily genetic, and the consequence of the selective breeding of dogs.