Patellar Luxation in Yorkies — Symptoms, Grades, Treatment and Recovery Guide

Patellar luxation — a kneecap that slips out of place — is one of the most common orthopedic problems in Yorkshire Terriers. In fact, Yorkies are among the breeds most frequently affected, along with other toy and small breeds like Pomeranians, Poodles, and Chihuahuas.

What Is Patellar Luxation in Yorkies?

Patellar luxation occurs when the kneecap (patella) slips out of its normal position in the groove of the thigh bone (femur). In Yorkies, the kneecap most commonly slips toward the inside of the leg — this is called medial patellar luxation (MPL).

The condition is often present from birth due to a genetic malformation. Many Yorkies are born with a shallow femoral groove that does not hold the kneecap securely. While some dogs never show symptoms, others experience intermittent lameness that can worsen with age and lead to arthritis.

Why Yorkshire Terriers Are Predisposed

Yorkies’ small size and leg structure make them particularly prone. The condition is so common in the breed that responsible breeders screen for it. Key risk factors include:

• Genetics — It is hereditary. If a Yorkie’s parents had patellar luxation, puppies are more likely to develop it.
• Leg conformation — The small, delicate bone structure means the patellar groove is often shallower than in larger breeds.
• Obesity — Extra weight puts additional stress on the knee joint, worsening existing luxation.
• Injury — Jumping off furniture or slipping on smooth floors can trigger luxation in a predisposed dog.

The Four Grades of Patellar Luxation

Veterinarians grade patellar luxation on a scale of I to IV, which determines the treatment approach:

• Grade I — The kneecap can be manually popped out but immediately returns to the groove. Most Yorkies with Grade I never need surgery.
• Grade II — The kneecap pops out during activity, causing the characteristic “skipping” or hopping gait where your Yorkie carries the leg for a few steps before it pops back in. Surgery may be recommended if lameness is frequent.
• Grade III — The patella sits permanently outside the groove but can be pushed back manually. The Yorkie shows a consistent abnormal gait. Surgery is strongly recommended.
• Grade IV — The kneecap is permanently dislocated and cannot be manually realigned. The limb may appear deformed. Surgery is medically necessary.

Symptoms to Watch For in Your Yorkie

The most telling sign is the “skipping” gait — your dog may run a few steps, hop on three legs, then resume normal walking as the kneecap pops back. Other symptoms include:

• Sudden lameness in one hind leg that comes and goes
• Reluctance to jump, climb stairs, or go for walks
• Stiffness after resting, especially in the morning
• Audible clicking sound from the knee joint
• Crying or yelping when the knee is manipulated
• Muscle wasting in the affected leg (chronic cases)

Non-Surgical Treatment for Grades I and II

For Yorkies with Grade I or mild Grade II luxation, surgery is often unnecessary. Management includes:

• Weight management — Keeping your Yorkie lean reduces knee pressure significantly.
• Joint supplements — Glucosamine and chondroitin support joint health and slow arthritis development.
• Anti-inflammatories — Your vet may prescribe NSAIDs during flare-ups.
• Physical therapy — Controlled leash walks strengthen supporting muscles.
• Home modifications — Ramps or steps to access furniture instead of jumping.

Surgical Treatment for Grades III and IV

Corrective surgery has a success rate of over 90% in small breeds. Several procedures may be combined:

• Trochleoplasty — The shallow bone groove is deepened so the kneecap sits securely.
• Tibial Tuberosity Transposition (TTT) — The tendon attachment point is relocated to straighten alignment.
• Soft tissue balancing — Loose tissues are tightened and tight tissues released.

Recovery After Surgery (8-Week Timeline)

• Weeks 1-2: Strict crate rest. E-collar to prevent licking. Short leashed bathroom breaks only. Cold compresses 3-4 times daily.
• Weeks 3-4: Gradual weight bearing. Short leash walks of 5-10 minutes. Warm compresses before walks.
• Weeks 5-6: Veterinary recheck with X-rays. Gradually increase walks if healing is on track.
• Weeks 7-8+: Gradual return to normal activity. Consider hydrotherapy to rebuild muscle.

Long-Term Outlook

Most Yorkies with patellar luxation live full, active lives with proper management. Early detection and treatment make a significant difference. If you notice your Yorkie skipping or limping, make a veterinary appointment promptly.