Last updated: May 6, 2026
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What Is Luxating Patella in Dogs?
Luxating patella, sometimes called a “slipping kneecap,” is one of the most common orthopedic conditions in dogs. It occurs when the patella (kneecap) slides out of its normal groove in the femur, causing the leg to temporarily lock up or skip. You might notice an affected dog suddenly lifting one hind leg mid-stride, hopping for a few steps, and then walking normally again as the kneecap pops back into place.
This condition is especially prevalent in small and toy breeds, including Chihuahuas, Pomeranians, Yorkshire Terriers, and Maltese, though it can affect dogs of any size. It ranges from barely noticeable to severely debilitating, depending on the grade of luxation. Many dogs with luxating patella live perfectly happy, active lives with minimal intervention.
If you are considering adopting a dog with luxating patella, you are looking at a condition that is well understood, highly treatable, and very manageable. These dogs deserve loving homes just as much as any other, and most adopters find the condition far less daunting than it initially sounds.
Understanding the Four Grades
Veterinarians classify luxating patella into four grades based on severity. Understanding your prospective dog’s grade helps you anticipate the level of care and potential costs involved.
Grade I: The kneecap can be manually pushed out of the groove during a veterinary exam but returns to its normal position on its own. Dogs with Grade I luxation often show no symptoms and may not even be diagnosed unless examined specifically for the condition. Surgery is almost never needed, and the dog can live a completely normal life.
Grade II: The kneecap occasionally luxates on its own during normal movement and may or may not return without intervention. Dogs may skip or hop intermittently, particularly when running or going up stairs. Grade II is the most commonly diagnosed level. Some dogs manage well without surgery, while others benefit from surgical correction, especially if the condition worsens over time.
Grade III: The kneecap is luxated most of the time but can be manually repositioned. Dogs with Grade III luxation typically have a persistent limp and may avoid using the affected leg during certain activities. Surgery is usually recommended to prevent further joint damage and arthritis.
Grade IV: The kneecap is permanently luxated and cannot be manually returned to the groove. This is the most severe grade and often involves significant structural deformity of the leg. Surgery is strongly recommended, and even after correction, some degree of chronic management may be necessary.
Surgery Options and Costs
Surgical correction of luxating patella is a well-established procedure with high success rates. Understanding the costs and options helps you plan financially when adopting a dog that may need the procedure.
The most common surgical techniques include:
- Trochleoplasty: Deepening the groove in the femur where the kneecap sits, creating a more secure channel that prevents luxation.
- Tibial crest transposition: Repositioning the bony attachment point of the patellar ligament to realign the kneecap’s tracking.
- Soft tissue reconstruction: Tightening or releasing surrounding tissues to better hold the kneecap in place.
Most surgeries combine two or more of these techniques for the best outcome. Typical costs include:
- Surgical correction (one knee): $1,500 to $3,500 at a general practice; $3,000 to $5,000 at a board-certified veterinary surgeon.
- Bilateral surgery (both knees): $2,500 to $6,000 at a general practice; $5,000 to $9,000 at a specialist. Some surgeons offer a discount when both knees are done simultaneously.
- Pre-surgical diagnostics: $200 to $500 for X-rays, blood work, and orthopedic examination.
- Post-surgical care: $100 to $300 for pain medications, anti-inflammatories, and follow-up appointments.
- Physical rehabilitation (optional but beneficial): $50 to $150 per session, typically recommended once or twice weekly for four to eight weeks.
Many pet insurance plans cover luxating patella surgery if the condition was not documented before the policy began. Some rescue organizations also cover or subsidize surgical costs as part of their medical programs.
Recovery and Rehabilitation
Recovery from luxating patella surgery requires patience and commitment, but the results are typically excellent. Here is what to expect during the healing process.
Weeks one through two: Strict rest and confinement. Your dog should be kept in a crate or small pen, with leash walks limited to brief bathroom breaks only. Swelling and bruising around the surgical site are normal. Pain medications and anti-inflammatories should be given as prescribed. An Elizabethan collar or recovery suit prevents licking of the incision.
Weeks three through four: Gradual increase in controlled leash walks, starting at five to ten minutes and building slowly. No running, jumping, or stairs. Your veterinarian will assess the incision and range of motion at a two-week recheck appointment.
Weeks five through eight: Continued increase in activity duration and intensity. Gentle physical therapy exercises like controlled sit-to-stand repetitions, slow walking over cavaletti poles, and underwater treadmill sessions (if available) help rebuild muscle strength and joint flexibility.
Weeks eight through twelve: Most dogs return to near-normal activity levels. A follow-up X-ray or exam at the eight-week mark confirms proper healing. Off-leash play and high-impact activities can usually resume around the 10 to 12-week mark with veterinary approval.
The success rate for luxating patella surgery is approximately 90 to 95 percent, with most dogs returning to full activity. Re-luxation occurs in roughly 5 to 10 percent of cases and may require revision surgery.
Daily Management Without Surgery
Not every dog with luxating patella needs surgery. Dogs with Grade I and many with Grade II luxation can be managed conservatively with lifestyle modifications and supportive care.
Weight management is the single most important factor. Extra weight places additional stress on the knee joint and accelerates cartilage wear. Keep your dog at a lean, healthy weight through portion control and regular, low-impact exercise.
Joint supplements containing glucosamine, chondroitin, and omega-3 fatty acids can support cartilage health and reduce inflammation. While they will not cure luxating patella, they may slow progression and improve comfort. MSM (methylsulfonylmethane) is another supplement some veterinarians recommend for joint support.
Appropriate exercise keeps muscles strong without stressing the joint. Swimming and leash walks on flat, even surfaces are ideal. Avoid activities that involve sudden stops, turns, or jumping, as these place shearing forces on the knee that can trigger luxation episodes.
Non-slip surfaces throughout your home help prevent slipping, which can exacerbate luxation. Area rugs on hardwood floors, rubber-backed mats in high-traffic areas, and paw wax or grip socks can all improve your dog’s traction and confidence.
Regular veterinary monitoring, typically every six to twelve months, tracks the condition’s progression. If a Grade I or II luxation worsens over time, your veterinarian may recommend surgical intervention before arthritis develops.
Preparing Your Home for a Dog With Luxating Patella
A few simple home modifications create a safer, more comfortable environment for a dog with a slipping kneecap.
- Add rugs or mats: Cover slippery floors, especially in areas where your dog walks frequently. Pay special attention to entryways, hallways, and the area around food and water bowls.
- Provide ramps or steps: If your dog sleeps on the bed or couch, a pet ramp or steps reduces the impact of jumping up and down. This is especially important for small breeds.
- Use an orthopedic bed: Supportive bedding cushions joints during rest. Memory foam beds are particularly good for dogs with orthopedic conditions.
- Block stair access: If possible, limit your dog’s use of stairs, especially during recovery or active flare-ups. Baby gates work well for this purpose.
- Keep nails trimmed: Long nails alter your dog’s gait and can worsen knee alignment. Regular nail trimming or grinding helps maintain proper foot mechanics.
These modifications are inexpensive and benefit dogs with many types of joint issues. You can find more preparation tips on our dog adoption page and through our pet adoption hub.
Frequently Asked Questions
Does luxating patella get worse over time?
It can. Repeated luxation causes wear on the cartilage and surrounding structures, potentially progressing from a lower grade to a higher one. This is why veterinary monitoring is important even for mild cases. Early intervention, whether through weight management, supplements, or surgery, can prevent progression and preserve joint function.
Is luxating patella painful for dogs?
Grade I luxation is typically painless. Grade II may cause intermittent discomfort, especially during active episodes. Grades III and IV often cause chronic pain due to ongoing joint instability, cartilage damage, and secondary arthritis. Dogs are skilled at hiding pain, so subtle signs like reluctance to jump, decreased activity, or licking at the knee may indicate discomfort.
Can both knees be affected?
Yes, bilateral luxating patella, affecting both hind legs, is actually quite common. Studies suggest that 30 to 50 percent of affected dogs have the condition in both knees. If surgery is needed, your veterinarian may recommend operating on both knees simultaneously or staging the procedures several weeks apart.
What breeds are most prone to luxating patella?
Small and toy breeds are most commonly affected, including Chihuahuas, Pomeranians, Yorkshire Terriers, Maltese, Toy and Miniature Poodles, Papillons, and Boston Terriers. However, larger breeds like Labrador Retrievers, Golden Retrievers, and Boxers can also develop the condition, often with lateral (outward) luxation rather than the medial (inward) luxation seen in small breeds.
Will my dog need physical therapy after surgery?
Physical rehabilitation is not strictly required but is highly recommended for the best outcomes. Hydrotherapy, especially underwater treadmill sessions, strengthens the muscles surrounding the knee without placing excessive stress on the joint. Even simple at-home exercises prescribed by your veterinarian can significantly improve recovery speed and long-term joint function.
