Spondylosis in dogs is one of those diagnoses that can sound alarming at first and then turn out to be far less dramatic than expected. The condition, also called spondylosis deformans, is a disease of the spine in which new bone growth—often described as bone spurs or osteophytes—forms around the edges of the vertebrae. A normal spine has separate vertebral blocks with intervertebral discs between them. In dogs with spondylosis, those bone spurs can become visible on imaging, and in more severe cases the new growth may bridge above and below the vertebrae, linking or fusing them. It is typically found in older dogs, and while it can progress over time like arthritis, many dogs continue to live full, happy lives after diagnosis.

The spine of a dog is divided into several regions, and spondylosis can appear in different areas. The cervical region supports the neck and shoulders, the thoracic region supports the chest and abdominal areas, and the lumbar region supports the lower back and hind end. The sacral region supports the hind end, while the caudal region includes the tail bones. The thoracic and lumbar areas are the most common places for spondylosis to develop. Because the condition mainly affects older dogs, pet parents are often encouraged to watch closely for changes in mobility, posture, or gait and to report those changes to a veterinarian.

Common signs of spondylosis can vary widely. Some dogs show no symptoms at all, which is one reason the condition is often discovered by accident during X-rays taken for unrelated reasons. When signs do appear, they may include incontinence, difficulty rising or walking, limping or lameness, dragging the hind legs or toes, an arched posture, stiffness, and reduced mobility. Occasionally, neurologic impairment can occur if a nerve is involved. For example, some pets with spinal trauma may develop incontinence because bone spurs impinge on the spinal cord and interrupt communication. If a dog suddenly has accidents in the house or soils bedding, a veterinary visit is important to rule out a medical cause before assuming the behavior is related to training or habit.

In severe cases, the amount and location of bone spurs may restrict movement in certain regions of the spine. The dog’s spine may appear stiff and inflexible, making it difficult to rise or walk. Back pain can be easy to overlook because obvious signs such as limping or lameness often draw more attention. Restricted movement from spurs may cause a dog to limp or become lame. Dragging hind legs or toes is a sign of possible nerve damage and should be assessed by a veterinarian right away. A dog may also arch its back and walk or stand that way when back pain is present.

Spondylosis is a chronic, age-related condition. As bones weaken with age, the body may create bone spurs to compensate for structural loss from daily wear and tear or traumatic injury, attempting to recreate stability along the spinal column and protect the spinal cord. Three groups may be at greater risk: dogs with existing spine or disc disease such as intervertebral disc disease, middle-aged to senior dogs, and boxers, which may have a higher risk. Diagnosis requires examination of the spinal structure with an X-ray or MRI. Most often, spondylosis is diagnosed incidentally when imaging is taken for another reason. By the time many affected dogs reach 10 years of age, evidence of spondylosis can generally be seen on X-rays.

Thankfully, the majority of dogs with spondylosis show no signs of pain or discomfort, and medication is usually not indicated for spondylosis alone. If a dog is in pain, a veterinarian may recommend non-steroidal anti-inflammatory medications, nutritional supplements such as glucosamine, methylsulphonylmethane, and chondroitin sulfate, or surgery in rare cases when a bony growth causes nerve compression. The prognosis for a dog with spondylosis, even severe spondylosis, is good. Many dogs have the condition but never show symptoms and live normal lives, while others are simply a bit stiff and limited in flexibility and range of motion.

As of 2026, there is still no proven way to prevent spondylosis itself, but keeping an older dog active and fit can help with many age-related changes. Research continues into prevention, particularly in boxers. One of the simplest preventive measures is also one of the hardest: keeping a dog at a healthy weight. Healthier treats or alternatives such as baby carrots, apple slices, or pieces of kibble can help. Good nutrition matters at every life stage, and older dogs may have different nutrition and caloric requirements. A pet parent can take photos of the front and back of the dog’s food bag before a veterinary visit so the veterinarian can calculate how much volume the dog should eat each day. Regular walks and low-impact exercise such as walking or swimming help keep muscles strong and supportive for aging joints. In short, spondylosis is often a manageable age-related finding—not a reason for panic—but it is always a reason for attentive veterinary care. 😊