Luxating Patella in Dogs: Symptoms, Treatment & When to Call the Vet | AI Pets Lab
Symptom Checker
Intermittent hind-leg lameness [mild]
Your dog runs or walks normally, then suddenly lifts one back leg for a few steps, then puts it down and walks fine again.
Skipping or hopping gait [moderate]
When trotting, your dog's back leg skips or hops every few strides — almost like a bunny hop on one side.
Sudden yelping during activity [moderate]
Your dog is playing or running and suddenly yelps, then stops and lifts the leg. After a few minutes, they go back to normal.
Reluctance to bear weight [severe]
Your dog holds the leg up for longer periods — not just a few seconds — and avoids putting it down even when standing still.
Knee swelling or warmth [moderate]
The affected knee looks larger than the other, feels warm to the touch, or your dog flinches when you gently press it.
Visible kneecap movement [moderate]
You can feel the kneecap slide in and out of the groove when you gently move the leg.
Frequently Asked Questions
My dog just screamed and won't put his leg down — what do I do right now?
That's scary, I get it. First, stay calm — panic won't help your dog. Pick him up if he's small, or gently lead him to a quiet spot. Check the knee: is it swollen? Does it look crooked? If the leg is dangling limp and he can't walk at all, head to the emergency vet. If he can put it down after a few minutes, it probably popped back on its own — but still call your vet tomorrow.
How do I know if it's a luxating patella or something else like a cruciate tear?
Tough one. With a luxating patella, the limp usually comes and goes — one minute they're hopping, the next they're fine. With a torn cruciate, the limp is constant and dogs often sit with the leg stuck out to the side. The hop test is the giveaway: if they skip like a bunny, it's likely the kneecap. But only X-rays can tell for sure.
My dog had one episode last week and nothing since — should I still see the vet?
Yes, definitely. That one episode tells you there's a structural issue — the kneecap slipped once, it'll happen again. A vet can grade the patella and tell you if your dog needs surgery or just lifestyle changes. Catching it early means less arthritis later.
What happens if I don't fix the luxating patella? Will my dog be okay?
Not really. Each time the kneecap slips, it grinds down the cartilage. Over months and years, that leads to arthritis — painful, stiff joints. Mild cases can be managed with weight control, but moderate to severe cases almost always need surgery to prevent crippling arthritis.
My 5-pound Yorkie has a grade 3 luxating patella — is surgery too risky for such a small dog?
I hear you — it's scary thinking about anesthesia for a tiny dog. But vets do this surgery all the time on Yorkies, Chihuahuas, even teacup breeds. The risk is low when done by a surgeon experienced with small patients. Not doing the surgery can lead to constant pain and lameness. Ask your vet about pre-op blood work and an experienced surgeon.
Can I prevent luxating patella in my puppy?
Somewhat. Since it's mostly genetic, you can't change the groove depth, but you can keep your puppy slim and avoid letting them jump off furniture. Use ramps, no standing on hind legs for treats, and provide joint supplements from a young age. If your breeder screens for patella issues, that helps too.