Does Legg-Calvé-Perthes disease always require surgery?

Not necessarily. Mild cases may be managed initially with activity restriction and pain relief under observation. If pain persists or functional impairment is significant, your vet will discuss whether surgery is needed — the decision should be based on their clinical assessment.

How soon after surgery will there be noticeable improvement?

Short-term post-operative pain typically improves within a few weeks, but bone and functional recovery can take several weeks to months. Regular follow-up visits and rehabilitation are needed — follow your vet's instructions for monitoring.

Is rehabilitation needed after surgery?

Most dogs that have undergone surgical treatment are recommended to undertake rehabilitation, including passive range-of-motion exercises or hydrotherapy, which help restore muscle strength and joint mobility. Follow the rehabilitation plan provided by your vet or specialist.

What information should I prepare before an orthopaedic appointment?

Bring video of your pet walking (front-on and side-on), a record of symptom progression, weight changes, a list of current medications, and any existing X-rays or examination reports. These help the vet assess the condition more efficiently.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

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Disease Guide

Legg-Calvé-Perthes Disease in Dogs: Hind Limb Lameness, X-Ray Diagnosis & Treatment Guide [2026]

Legg-Calvé-Perthes disease is avascular necrosis of the femoral head in young dogs, most common in small breeds, and often requires surgical removal of the femoral head.

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap Editorial Team

Sources: ACVS, WSAVA, National Taiwan University Veterinary Hospital

When to See a Vet

Requires immediate veterinary care (emergency)

•Hind leg suddenly cannot touch the ground at all or unable to stand
•Persistent severe pain that cannot be soothed or relieved by rest
•Severe drop in alertness, or completely motionless and slow to respond

Schedule a clinic visit soon (within 24–72 hours)

•One hind leg gradually worsening but still able to walk short distances
•Clearly avoiding or showing pain when the hip is touched or when turning
•Less willing to jump, use stairs, or play

01What symptoms indicate something is wrong?

Legg-Calvé-Perthes disease typically presents as unilateral hind limb lameness and hip discomfort, with pain most noticeable during activity or turning. Long-term cases may show muscle atrophy on the affected side.

Gradual or intermittent lameness in one hind leg
Obvious pain or reluctance to bear weight during movement or turning
Reluctance to jump, climb stairs, or play
Progressive muscle atrophy in the affected thigh, which appears noticeably thinner
Flinching, pulling the leg away, or strong reactions when the hip is touched

Seek emergency care immediately if you notice the following symptoms:

⚠️ Sudden complete inability to bear weight or stand on the hind leg
⚠️ Persistent severe pain that cannot be soothed or relieved by rest
⚠️ Severe deterioration in alertness, complete immobility, or unresponsiveness

02How to assess an abnormality at home? Key observations and when to seek emergency care

Recording representative changes and video footage at home before your vet visit helps the vet assess the progression more quickly and plan the appropriate diagnostic workup.

Record the date lameness was first noticed, how often it occurs, and whether it is worsening
Use your phone to film your pet walking, capturing both a front-on and side-on view
Observe changes in willingness to jump, climb stairs, and play
Weigh your pet daily and monitor weight trends (weight loss or sudden changes)
Note any changes in appetite, water intake, and toileting habits
If possible, schedule an orthopaedic or specialist clinic with X-ray capability as soon as possible

03How does the vet diagnose this? Common examination steps

The vet will conduct a physical examination and use imaging to assess the femoral head and acetabular structure. Advanced imaging or sedation may be required in some cases.

Physical examination

palpation of the hip joint, assessment of range of motion and pain points

X-ray

evaluation of femoral head morphology, acetabular shape, and symmetry

Advanced imaging (CT / MRI)

used for complex cases or pre-surgical assessment

Blood and biochemistry tests

assessment of overall health and anaesthetic risk

Comprehensive imaging or functional assessment under sedation when needed

Referral to a specialist hospital with orthopaedic expertise is recommended for suspected cases

04How is it treated and managed after diagnosis? Medications, diet adjustments, and care guide

Treatment includes conservative management or surgery; post-operative monitoring and rehabilitation are critical for functional recovery.

Short-term management focuses on pain relief and activity restriction to reduce weight-bearing on the damaged femoral head
Some cases may require surgery to improve hip joint function and relieve pain
Post-operative rehabilitation planning and restriction of jumping and strenuous activity for several weeks to months is required
Regular follow-up visits to monitor X-ray changes and clinical functional recovery
Weight and dietary management to reduce joint load and support recovery
Consultation with an orthopaedic specialist is recommended to determine the most appropriate treatment and follow-up plan

05What to prepare before seeing the vet? Key information to help the vet quickly identify the cause

Write down when lameness first appeared and how symptoms have progressed over time

Bring video footage of your pet walking (front-on, side-on, and clips of jumping or stair climbing if possible)

List all current medications, supplements, and known allergies

Record recent trends in appetite, toileting habits, and weight changes

If previous X-rays or examination reports are available, bring them along for comparison

Use a secure carrier and book an appointment at a specialist clinic with orthopaedic capability

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.

Related Symptoms (You May Also Be Looking For)

Lameness

Limping

Decreased Range Of Motion

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