What It Is
Legg-Calvé-Perthes disease is idiopathic avascular necrosis of the femoral head and neck in growing dogs, leading to collapse, deformity, hip pain, lameness, and secondary osteoarthritis.
Also Called: Legg-Calvé-Perthes disease; avascular necrosis of the femoral head; aseptic necrosis of the femoral head; LCPD
Abbreviation: LCP
Breeds Affected: More common in small and toy breeds. Featured examples include: Affenpinscher; Australian Terrier; Chihuahua; Havanese; Manchester Terrier; Miniature Pinscher; Pomeranian; Rat Terrier; Toy Poodle; Yorkshire Terrier.
Breed Risk Note: This is not a complete breed list. Other small breeds can be affected too, and the disease usually shows up in growing little dogs, not giant adults.
The Idiot-Proof Explanation
The blood supply to the ball of the hip gets disrupted, the bone starts to die, and the top of the femur slowly collapses. In plain English, the puppy ends up with a very painful hip that was built to fail early.
What Causes It
Legg-Calvé-Perthes disease happens when blood flow to the femoral head is compromised. Without adequate blood supply, the bone becomes necrotic, weak, misshapen, and painful.
The exact cause is not fully nailed down, but a hereditary component is strongly suspected. It is most often seen in young miniature and small-breed dogs, usually when they are still growing.
- The femoral head loses blood supply and the bone begins to deteriorate.
- The disease usually shows up in puppies or young adolescents, often around 4 to 11 months of age.
- Small and toy breeds are overrepresented.
- Both hips can be affected, although one side may look worse first.
This is not a puppy “growing pain” phase. It is a structural hip disease that causes real pain and usually needs real intervention.
What This Means for Life With This Dog
Owners usually notice a young small dog that starts limping on a rear leg, moving stiffly, or avoiding normal play. Because the dog is tiny, people are weirdly good at underestimating how painful this can be.
Many dogs need surgery, most commonly a femoral head ostectomy. The good news is that small dogs often recover quite well when the painful bone is removed and rehab is taken seriously.
The bad news is that waiting does not make dead bone suddenly become a good hip. It just means more pain, more muscle loss, and a crankier recovery later.
Can It Be Fixed?
The diseased femoral head does not regrow into a normal hip. Mild cases may be medically managed for a short period, but surgery is commonly the recommended treatment. Prognosis after appropriate surgery is often good, especially in small dogs with solid rehab follow-through.
Symptoms Owners May Notice
Rear-leg lameness in a young dog: A puppy or young small dog starts limping, toe-touching, or carrying a rear leg without a good explanation that sticks.
Hip pain or stiffness: The dog may cry, resist hip extension, bunny-hop, or move like the back end no longer trusts the assignment.
Thigh muscle loss: Because the dog quits using the leg normally, the thigh muscles often shrink compared to the other side.
Reduced activity or strange sitting posture: Play drops off, jumping looks less fun, and some dogs sit awkwardly because the sore hip is not cooperating.
Treatment Options
Veterinary exam and radiographs: Diagnosis typically involves exam plus hip radiographs that show collapse, irregularity, and deformation of the femoral head and neck.
Pain control and conservative support: Medication, activity restriction, and careful monitoring may be used early or while planning surgery, but conservative management has limits and does not reverse the underlying bone damage.
Surgery and rehabilitation: Femoral head ostectomy is common and often effective in small dogs. In select cases, total hip replacement may be discussed, but that is a very different price bracket and not the default path.
Recovery and Aftercare
Aftercare usually means activity restriction, controlled rehab, pain medication, follow-up visits, and encouraging the dog to use the leg correctly. The better the rehab, the less likely the dog is to make a weird little life choice and keep the limb half-parked forever.
What Happens If You Wait
Dead bone does not appreciate being ignored.
Waiting allows more collapse of the femoral head, worsening pain, muscle loss, and more arthritis. The dog may still limp around on three and a half legs, but that is not a treatment plan.
Cost Reality Check
LCP costs depend on how advanced the disease is at diagnosis, whether one or both hips are involved, whether surgery is performed, and how much rehabilitation the dog needs afterward.
| Care Level | What It May Include | Estimated Cost |
|---|---|---|
| Initial workup | Exam, radiographs, initial pain control, and treatment planning. | $300-$900 |
| Ongoing management | Repeat visits, medication, rehab, and short-term management while monitoring or preparing for surgery. | $400-$1,500+ |
| Severe case | Femoral head ostectomy or more advanced surgery, anesthesia, hospitalization, and structured rehabilitation. | $2,500-$7,000+ |
One hip or both: Bilateral disease turns one orthopedic bill into a sequel nobody wanted.
Surgery choice: An FHO and a total hip replacement are not remotely the same financial experience.
Rehabilitation needs: Some dogs bounce back beautifully. Others need more guided rehab to regain strong, normal limb use.
Timing: Catching it earlier usually means less secondary damage than waiting until the hip has had time to fully collapse and arthritic itself into a corner.
Budget Reality Check
| Budget Item | Estimated Cost |
|---|---|
| Veterinary exam and hip radiographs | $150-$800 |
| Pain medication and follow-up visits | $150-$600+ |
| Femoral head ostectomy (FHO) | $2,000-$5,000+ |
| Rehabilitation or physical therapy | $300-$2,000+ |
| Advanced orthopedic surgery | $4,000-$10,000+ |
Lifetime Cost Reality
| Case Pattern | Possible Lifetime Cost |
|---|---|
| Mild or early-managed case | $500-$2,000+ |
| Typical surgical FHO case | $2,500-$6,000+ |
| Complicated or bilateral case | $5,000-$12,000+ |
Tell Me What I Should Really Expect
LCP is a painful young-dog hip disease, not a cute little limp that deserves a few months of denial.
The upside is that many small dogs do very well after the right surgery and rehab. The downside is that getting there still requires money, follow-through, and accepting that a tiny dog can have a very real orthopedic problem.