If your small dog suddenly lifts one back leg, skips for a few steps and then carries on as though nothing happened, it can be easy to dismiss it as a funny little habit.
But that brief hop can be one of the most recognisable signs of a luxating patella in dogs—a kneecap that slips out of its normal groove.
Quick answer: an occasional skip does not confirm a luxating patella, but a recurring skip, hop or intermittent back-leg limp is worth discussing with your vet. A short video recorded at home can be especially helpful.
What is a luxating patella?
The patella is your dog’s kneecap. It normally sits within a groove at the end of the thigh bone and helps the knee bend and straighten smoothly.
With a luxating patella, the kneecap moves outside that groove. In small dogs it most often slips towards the inside of the leg, which is known as a medial patellar luxation.
Sometimes the kneecap returns to position almost immediately. That is why a dog can hold up a back leg for a few steps and then suddenly walk normally again.
The condition ranges from mild, occasional movement of the kneecap to more severe cases in which it is frequently or permanently out of position.
Why are small dogs more prone to luxating patella?
Patellar luxation can affect any dog, but it is particularly common in small and toy breeds. Chihuahuas, Yorkshire Terriers, Pomeranians, Toy and Miniature Poodles, Bichons and similar breeds are among those more frequently affected.
In many dogs there is a developmental or inherited component. In other words, it is not necessarily something you caused by allowing your dog to jump off the sofa or play enthusiastically. Some dogs are simply born with leg and knee anatomy that makes the kneecap less stable.
Signs of luxating patella in dogs
The classic sign is the characteristic “skip”. You might notice your dog:
- Suddenly holding up a back leg
- Skipping or hopping for a few steps
- Running briefly on three legs before returning to normal
- Developing an intermittent back-leg limp
- Kicking or shaking the leg before putting it down again
- Becoming reluctant to jump, run or climb stairs
- Showing stiffness after rest
- Having episodes that become more frequent over time
Your dog may move normally by the time you reach the clinic because the problem can be intermittent. If it is safe to do so, record a video of the unusual gait at home to show your vet.
If your dog cannot put the leg down, appears to be in significant pain or has suddenly become very lame, contact your vet promptly.
Why does a luxating patella matter?
A luxating patella is not only about the occasional skip. Each time the kneecap moves abnormally, the mechanics of the knee change. Repeated instability can damage cartilage and contribute to osteoarthritis and discomfort over time.
The American College of Veterinary Surgeons also notes that other structures in the knee can become strained, potentially increasing the risk of further injury.
That is why it is sensible to have a recurring skip or intermittent limp assessed rather than assuming it is simply a quirk.
How is a luxating patella diagnosed?
Your vet will usually assess the stability and movement of the kneecap during an orthopaedic examination. Depending on your dog’s symptoms and the severity of the problem, they may recommend X-rays or further tests.
Luxating patellae are commonly described using four grades:
- Grade 1: the kneecap can be moved out of place during an examination but returns by itself.
- Grade 2: the kneecap slips out intermittently and may remain out until the leg moves in a particular way.
- Grade 3: the kneecap is out of position most of the time but can be moved back manually.
- Grade 4: the kneecap is permanently out of position and cannot be manually returned to the groove.
The grade is only one part of the picture. Your dog’s pain, mobility, age and how often the problem occurs all help guide treatment decisions.
Treatment and long-term support
Not every dog with a luxating patella needs surgery. For a mild case, your vet may recommend monitoring and a conservative management plan.
Maintain a healthy body weight
Keeping your dog lean reduces unnecessary load on vulnerable joints. Ask your veterinary team to help you assess your dog’s body condition if you are unsure.
Use appropriate, controlled exercise
Regular movement helps maintain muscle strength, but the right type and amount of exercise will depend on your dog. Sudden twisting, repeated jumping or unsuitable high-impact activity may need to be limited.
Consider physiotherapy when recommended
Canine physiotherapy can support strength, coordination and comfortable movement as part of a vet-led plan. The programme should be tailored to the individual dog rather than copied from a generic online routine.
Follow your vet’s pain-management advice
Suitable painkillers may make a huge difference. Remember, dogs don't live as long as us. Being in pain for months or years could represent a huge proportion of their short lives.
Where does joint nutrition fit?
You cannot supplement a luxating patella back into place. If the underlying anatomy is causing significant instability, nutritional support will not correct it.
Nutrition can, however, be a really helpful part of a wider plan to support normal joint health and mobility.
Truffle Hound Advanced Joint Health was created to support healthy joints, mobility and the tissues involved in comfortable movement. Its combination of functional mushrooms, green-lipped mussel, hyaluronic acid and naturally sourced ingredients is designed for everyday nutritional joint support.
For a dog with a luxating patella, that does not mean the blend will stop the kneecap from slipping—it will not. It may instead form part of a proactive joint-care routine agreed with your vet, alongside weight management, appropriate exercise and rehabilitation where needed.
What if surgery is recommended?
The decision to operate depends on factors including the grade of luxation, how often it occurs, whether your dog is experiencing pain or lameness, and how the condition affects everyday mobility.
If surgery is recommended, your veterinary team will guide you through pain relief, restricted activity, follow-up checks and rehabilitation. These are the foundations of recovery, and their instructions should take priority over general online advice.
Supplements around surgery
If your dog already takes Advanced Daily Defence, Advanced Joint Health or any other supplement, tell your vet before surgery. They can advise whether it should be continued, paused or reintroduced during recovery.
Advanced Daily Defence is a seven-mushroom blend designed for broad everyday nutritional support. It is not a surgical recovery product and does not replace veterinary treatment, medication, rest or rehabilitation.
Frequently asked questions
Can a luxating patella heal on its own?
The kneecap may move back into position by itself during an episode, but the underlying anatomical tendency usually remains. Mild cases may be monitored or managed conservatively; more significant cases may require surgery. Your vet can advise after examining your dog.
Does every dog with a luxating patella need surgery?
No. Treatment depends on the severity of the condition and the dog’s symptoms. Some mild, comfortable cases can be managed without surgery, while frequent luxation, pain or impaired mobility may make surgical correction more appropriate.
Can joint supplements fix a luxating patella?
No. A supplement cannot physically stabilise or reposition the kneecap. Joint nutrition may support general joint health, but it should sit within a wider veterinary care plan.
What should I do if my dog keeps skipping on a back leg?
Record a short video if you can do so safely and arrange a veterinary assessment. A skip can have more than one cause, so an examination is important before assuming it is a luxating patella.
Don’t ignore the little skip
A luxating patella can begin with something very easy to overlook: a tiny hop, a brief limp or a funny little skip.
It may turn out to be mild, but if it keeps happening, it is worth finding out why. Early veterinary assessment can help you understand what is happening inside the knee and take a proactive approach to your dog’s long-term mobility.
Notice the skip. Check the knee. Support the joint. Keep them moving.
Explore Truffle Hound Advanced Joint Health.
This article is for general educational purposes and is not a substitute for veterinary advice, diagnosis or treatment. Speak with your vet about new, recurring or worsening lameness and before introducing supplements around surgery or alongside medication.