Patella Luxation

Patella luxation in dogs is a common orthopedic condition where the kneecap (patella) slips out of its normal groove on the femur, causing intermittent lameness, a "skipping" gait, or three-legged walking

Clinical symptoms
  • Not wanting to be active or exercise.
  • Behavioral changes;
    • Patella Luxation in dogs can lead to significant pain-related aggression, often causing sudden behavioral changes like snapping / snarling, which may not necessarily be directed at the painful area.
  • Walking in an unusual way, such as a skipping gait or three-legged walking.
  • Limping or lameness.
  • Stiffness.
It is important to remember that we talk about probabilities. A grade is just a grade. It is also possible for a dog with an grade loose knee to live a completely normal life.

Please note that symptoms may differ from those mentioned above.
Inheritance & morbidity
Grade Affect Percentage
0 - Normal
Patella stays in place.		 726/746 97%
1 - Almost Normal/Mild
Patella can be manually luxated but returns to its position immediately.		 14/746 2%
2 - Moderate
The patella luxates frequently, often with manual manipulation or joint movement, and stays out until manually replaced or by moving the leg.
4/746 1%
3 - Moderate dysplasia
Patella luxated continually, and can be manually replaced but will reluxate spontaneously when manual pressure is removed.
1/746 0%
4 - Severe Dysplasia
Patella luxated continually and cannot be manually replaced.
0/746 0%
Operated 1/746 0%
Data from Finnish Kennel Club - Tibetan Terriers evaluated 2015-2025.

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