Patellar Luxation in Dogs: Understanding a Slipping Kneecap

In this guide

A small dog that occasionally skips or hops on one hind leg for a few strides before walking normally again is a scene many Indian pet parents have watched with a mix of concern and confusion. This is often patellar luxation, a kneecap that slips out of its normal groove, and it is one of the most common orthopaedic conditions seen in small and toy breeds.

What Is Happening in the Joint

The patella, or kneecap, normally glides up and down within a groove at the end of the thigh bone as the leg bends and straightens. In dogs with patellar luxation, that groove is too shallow, or the surrounding tendons and ligaments are misaligned, allowing the kneecap to slip out of place, usually towards the inside of the leg. When this happens, the dog will often hold the leg up for a few steps, sometimes giving a visible skip or kick, before the kneecap slides back into position on its own and normal walking resumes.

Which Dogs Are Affected

This condition is strongly linked to breed, appearing far more often in small and toy breeds such as Pomeranians, Chihuahuas, Poodles and similar dogs common in Indian apartments and homes, where it is largely inherited. It typically starts young, sometimes noticeable from puppyhood, and around half of affected small dogs have it in both knees. Larger breeds can develop it too, though less often, and their cases tend to involve more significant bone deformity.

The Four Grades

Vets classify patellar luxation on a scale from grade one to grade four based on severity. Grade one is the mildest, where the kneecap can be pushed out of place manually but returns on its own and rarely causes visible symptoms. Grade two involves the kneecap slipping during normal movement, occasionally causing skipping. Grade three means the kneecap is out of place most of the time and only occasionally sits correctly, causing a persistent, bow-legged gait. Grade four is the most severe, with the kneecap permanently displaced and significant mobility impairment.

Treatment Options

Mild grade one, and many grade two cases without ongoing discomfort, are often managed conservatively with weight control, joint-supporting supplements, and controlled exercise rather than surgery. Grade three and four luxations, and grade two cases causing persistent lameness or discomfort, generally benefit from surgical correction, which realigns the soft tissue and, where needed, deepens the groove the kneecap sits in. Surgical outcomes are generally very good, with the great majority of owners reporting satisfaction with their dog's mobility afterwards, particularly when surgery is done before significant arthritis has developed.

Living With a Mild Case

• Keep your dog at a healthy weight, since excess weight places additional strain on an already vulnerable joint.
• Avoid activities involving repeated jumping on and off furniture or sharp turns at speed, which can worsen mild luxation over time.
• Ask your vet about joint supplements containing glucosamine and chondroitin if your dog has an ongoing mild luxation.
• Have regular vet check-ups to monitor whether a mild case is staying stable or progressing towards needing surgery.

It is worth knowing that a dog living with an untreated or poorly managed luxation for years is at higher risk of also tearing the cranial cruciate ligament in the same knee, since the abnormal kneecap movement places uneven strain on the joint over time, which is one more reason not to dismiss a mild, longstanding skip as purely cosmetic.

Post-Surgical Physiotherapy

Following patellar luxation surgery, a structured physiotherapy plan, even simple vet-guided exercises done at home, meaningfully improves the speed and quality of recovery compared to rest alone. This often includes controlled leash walks that gradually increase in length, along with specific exercises to rebuild muscle around the knee. Many Indian veterinary hospitals now offer post-surgical rehabilitation support, and asking about this option before surgery helps plan for a smoother recovery period afterwards.

Asking your vet for a written, step-by-step home exercise plan, rather than relying on memory from a single verbal explanation at a busy appointment, makes it considerably easier to stay consistent with rehabilitation exercises over the weeks following surgery.

A consistent, well-supported recovery period gives the surgical repair the best possible chance to hold up over the long term.

A brief, honest conversation with your vet clears up most uncertainty here.

Common Questions

Is patellar luxation painful?

Mild grades often cause little to no pain, though more severe or long-standing cases can lead to discomfort and secondary arthritis, which is one reason not to ignore a worsening skip or limp.

Can patellar luxation be prevented?

Since it is largely inherited, there is no reliable way to prevent it in a predisposed breed, though maintaining a healthy weight and avoiding excessive jumping can reduce strain on the joint.

How much does patellar luxation surgery typically cost?

Costs vary considerably by clinic, region and grade of luxation, so it is best discussed directly with your vet, who can also explain what the specific procedure for your dog's case involves.

Article content © Ravi Teja. All rights reserved.