What Is Spondylosis Deformans?
Spondylosis deformans is a degenerative condition in which bony spurs, called osteophytes, form along the edges of the vertebrae, usually on the underside of the spine. Over time, spurs from neighboring vertebrae can grow toward each other and even fuse into a bony bridge. It is very common in middle-aged and older dogs and also occurs in cats.
In most pets, spondylosis is an incidental finding on X-rays taken for another reason. The spurs form slowly and the spine stiffens gradually, so many dogs never show any signs at all.
Not the same as discospondylitis
The names are similar, but discospondylitis is a painful infection of the disc and vertebrae that needs antibiotics. Spondylosis is a non-infectious, age-related change that is often painless.
Causes and Risk Factors
- Age: the single biggest factor; most older large dogs show some spondylosis on X-rays.
- Breed and size: large and giant breeds are commonly affected, and Boxers have a known hereditary predisposition. German Shepherds are also frequently affected.
- Spinal wear and instability: repeated stress or minor injury to the spine is thought to trigger new bone as the body tries to stabilize the joints.
- Disc degeneration: spurs often form near ageing or degenerating discs.
Signs Owners Notice
Many affected pets have no signs. When signs appear, they are usually mild and slow to develop:
- A stiff back or reluctance to twist, jump or climb stairs
- Slowness getting up after rest
- A shorter stride or a slightly hunched posture
- Back pain if a spur fractures or presses on a nearby nerve
Because these signs overlap with arthritis, hip problems and disc disease, a full exam is needed to find the true cause.
Diagnosis
Spondylosis is diagnosed on X-rays of the spine, where the spurs are easy to see. The key question for your vet is whether the spondylosis is actually causing the signs. A neurological exam, and sometimes MRI or CT, checks for other problems such as IVDD or cauda equina syndrome that can coexist with spondylosis and cause pain or weakness.
Treatment and Outlook
- No signs: no treatment is needed; it is simply monitored.
- Pain relief: anti-inflammatory and pain medications prescribed by your vet for flare-ups.
- Weight control: keeping your pet lean reduces strain on the spine.
- Rehabilitation: gentle, regular exercise, physiotherapy and hydrotherapy help maintain flexibility and core strength.
- Surgery: rarely needed, only if a spur compresses a nerve or the spinal cord.
The outlook is very good. Most pets with spondylosis live comfortably, and the condition itself does not shorten life.
Practical Tips for US Pet Owners
- Use ramps or steps for cars and furniture to limit jumping.
- Choose steady, moderate walks over high-impact games for senior dogs.
- Provide a supportive orthopedic bed in a warm, draft-free spot.
- Find a practice offering rehab or senior care through veterinary clinic listings.
When to see a vet
Book a visit for new stiffness, back pain or a change in how your pet walks. Go urgently if your pet cries out when touched, drags its back legs, or loses bladder or bowel control, as these suggest a disc or nerve emergency rather than spondylosis alone.
Key Takeaways
- Spondylosis deformans is bony spurs along the spine, common in older dogs.
- It is usually painless and found by chance on X-rays.
- When pain occurs, rule out other spinal problems first.
- Weight control, gentle exercise and pain relief keep most pets comfortable.
FAQ
Is spondylosis deformans the same as arthritis?
It is a degenerative bone change of the spine, but unlike true arthritis it does not usually involve the joint surfaces and is often painless.
Can spondylosis be reversed?
No. The bone spurs are permanent, but they usually do not need treatment.
Do cats get spondylosis?
Yes, especially older cats. It is often found on X-rays and rarely causes obvious signs.