CONDITION
Spondylosis in Dogs
A condition involving bony growths along the spine that may or may not cause stiffness and reduced flexibility.
Why this matters now
Spondylosis deformans is primarily a condition of ageing, with bony changes along the spine developing gradually over years. It is most commonly identified in middle-aged to older dogs, though the process may begin earlier than clinical signs suggest. Larger breeds and working dogs who have experienced repetitive spinal loading may show changes at a younger age, and certain breeds — including Boxers, German Shepherds, and other large-bodied dogs — appear to be over-represented. The condition is often discovered incidentally on radiographs taken for other reasons, highlighting how common subclinical spinal changes are in the ageing dog population. Because spondylosis develops slowly, the point at which it becomes clinically relevant varies enormously between individuals.
Spondylosis typically follows a slow, progressive course characterised by the gradual formation of bony spurs (osteophytes) along the ventral and lateral margins of vertebral bodies. In many dogs, these changes remain clinically silent throughout life, producing no observable discomfort or functional limitation. In others, the osteophytes may grow large enough to bridge adjacent vertebrae, effectively fusing segments of the spine — a process that can paradoxically reduce pain by eliminating movement at the affected joint. The clinical course tends to fluctuate: periods of active bone growth may be associated with local inflammation and discomfort, while established, mature bridging may cause stiffness but relatively little pain. Individual variation in progression is considerable, with some dogs showing extensive radiographic changes but minimal clinical signs, and others experiencing significant discomfort from relatively modest bony changes.
Signals & patterns
Early signals
Stiffness after rest
One of the earliest observations owners may notice is their dog appearing stiff or slow to rise after periods of rest, particularly first thing in the morning or after a long nap. The dog may take several steps before their gait smooths out, a pattern sometimes described as 'warming up.' This stiffness tends to be more pronounced in cold or damp weather. The pattern of improving with gentle movement but worsening after prolonged inactivity is characteristic of degenerative spinal conditions.
Reduced spinal flexibility
Dogs may show a subtle loss of the normal lateral curvature and flexibility of the spine during movement. Activities that require twisting or arching the back — such as turning sharply, looking behind themselves, or rolling over — may become noticeably stiffer or more deliberate. Owners may observe that their dog moves in a more rigid, 'wooden' fashion compared to their previous fluidity. This reduced range of motion reflects the mechanical limitation imposed by osteophyte formation along the vertebral margins.
Reluctance with certain movements
Jumping onto furniture, climbing stairs, or entering vehicles may become hesitant or require more effort. Dogs who previously launched themselves onto the sofa with ease may pause, attempt the jump from a different angle, or decline altogether. This reluctance typically develops gradually and may initially be attributed to general ageing rather than a specific spinal condition. Some dogs develop compensatory movement strategies, such as using their forelimbs more and their hindlimbs less to propel themselves upward.
Sensitivity to spinal touch
Some dogs may react when the affected areas of their back are touched, stroked, or pressed. This can manifest as flinching, tensing, turning to look at the person touching them, or moving away. The sensitivity may be intermittent, corresponding with periods of active osteophyte growth and associated inflammation. Owners may notice this during grooming, petting, or when the dog is being examined, particularly along the lumbar and thoracolumbar spine where spondylosis most commonly develops.
Later signals
Visible postural changes
As spondylosis progresses, some dogs develop a characteristic roached or hunched back posture, particularly when standing still. The topline of the spine may appear straighter or more rigid than normal, losing the gentle curves typical of a relaxed standing posture. Some dogs shift their weight distribution, standing with their hindlimbs further under their body or adopting a base-wide stance. These postural adaptations reflect the dog's attempt to minimise discomfort and distribute mechanical load away from affected spinal segments.
Exercise intolerance
Dogs with more advanced spondylosis may show reduced enthusiasm for or endurance during physical activity. Walks that were previously manageable may need to be shortened, or the dog may slow down significantly during the latter portion of exercise. Some dogs alternate between periods of relatively normal activity and days of increased stiffness, with the variation potentially related to activity levels, weather, or the unpredictable nature of inflammatory flare-ups around actively growing osteophytes.
Neurological signs in severe cases
In uncommon but notable cases, particularly large osteophytes may impinge on nerve roots as they exit the spinal canal, producing neurological signs such as intermittent hindlimb weakness, knuckling, or an altered gait pattern. The dog may scuff their hind feet, cross their legs while walking, or show asymmetric weakness. These signs tend to develop gradually and may fluctuate, sometimes being more apparent when the dog is tired. Neurological involvement represents a more significant clinical presentation and typically warrants closer investigation.
Muscle changes along the spine
Over time, dogs with significant spondylosis may develop muscle wasting (atrophy) along the affected areas of the spine as reduced movement leads to decreased muscle engagement. Conversely, compensatory muscle hypertrophy may develop in areas that are working harder to make up for restricted spinal mobility. Owners may notice that the topline appears different — bumpier, less symmetrical, or with more prominent bony landmarks — as the relationship between muscle mass and bony changes evolves.
Click to read about the biological mechanisms
How this is usually investigated
Investigating spondylosis typically involves imaging to characterise the extent and location of bony changes, combined with clinical assessment to determine whether the radiographic findings correlate with the dog's symptoms. Because spondylosis is extremely common as an incidental finding in older dogs, the challenge often lies in establishing whether the observed changes are actually responsible for the clinical signs or whether another condition is contributing. A thorough approach considers both the spinal changes and other potential sources of pain or stiffness.
Radiography (X-rays)
Neurological examination
Advanced imaging (CT or MRI)
Orthopaedic and musculoskeletal assessment
Options & trade-offs
Management of spondylosis, when clinical signs are present, typically focuses on comfort and maintaining mobility rather than reversing the underlying bony changes. The approach is often multimodal, combining several strategies tailored to the individual dog's level of discomfort, functional limitations, and overall health status. Because the condition tends to be chronic and progressive, management plans often evolve over time as the dog's needs change.
Pain management medications
Non-steroidal anti-inflammatory drugs (NSAIDs) are among the most commonly considered pharmacological options for managing discomfort associated with active spondylosis. These medications address both the pain and inflammatory components that may accompany osteophyte growth. Other analgesic categories, including gabapentinoids for neuropathic pain components and paracetamol-based preparations in appropriate species and dosages, may also be considered. The choice of medication depends on the individual dog's health status, particularly hepatic and renal function, and any concurrent conditions or medications.
Trade-offs: Long-term NSAID use requires regular monitoring of organ function, particularly kidney and liver parameters. Some dogs may experience gastrointestinal side effects. Finding the appropriate medication type and dosage for a given individual often involves a period of adjustment. The need for ongoing medication represents a long-term commitment in terms of both cost and monitoring.
Physical rehabilitation and exercise management
Structured exercise programmes designed to maintain spinal mobility, strengthen supporting musculature, and improve overall fitness can play a significant role in managing dogs with spondylosis. Hydrotherapy — particularly underwater treadmill work — provides low-impact exercise that supports movement without loading the spine excessively. Physiotherapy techniques including stretching, range-of-motion exercises, and targeted strengthening may help maintain function. The goal is to find the balance between sufficient activity to prevent muscle loss and excessive activity that may exacerbate discomfort.
Trade-offs: Access to canine rehabilitation facilities varies by location. Regular sessions require time and financial commitment. The appropriate intensity and type of exercise varies between individuals and may need frequent adjustment. Some dogs are reluctant to participate in structured exercise, particularly during periods of increased discomfort.
Weight management
Maintaining an optimal body condition is particularly relevant for dogs with spinal conditions, as excess weight increases the mechanical load on the vertebral column and may accelerate degenerative changes. Even modest weight reduction in overweight dogs can meaningfully reduce the forces transmitted through the spine during daily activities. Nutritional assessment and appropriate dietary planning form the foundation of this approach, taking into account the dog's activity level, metabolic needs, and any concurrent health conditions.
Trade-offs: Weight management requires consistent commitment from all household members and may involve changing established feeding routines. Reduced-calorie diets must still meet nutritional requirements, particularly for older dogs. In dogs with decreased mobility, the reduced exercise capacity can make weight loss more challenging, creating a cycle that requires creative solutions.
Environmental modifications
Practical adjustments to the dog's living environment can reduce the physical demands that may exacerbate spinal discomfort. Ramps or steps for accessing furniture and vehicles, raised food and water bowls to reduce neck flexion, orthopaedic bedding that supports the spine, and non-slip flooring to improve confidence during movement are commonly considered modifications. These changes aim to reduce the mechanical challenges the dog faces during routine daily activities, allowing them to function more comfortably within their home environment.
Trade-offs: Some modifications require upfront investment and space. Not all dogs immediately accept or utilise new equipment such as ramps. The extent of modification needed may increase over time as the condition progresses. These changes address comfort and function but do not alter the underlying progression of the condition.
Complementary approaches
Various complementary modalities may be explored as part of a broader management strategy. Acupuncture, laser therapy, massage, and chiropractic or manual therapy are among the approaches that some owners and practitioners consider for dogs with spinal conditions. The evidence base varies between modalities, but some dogs appear to respond positively to these interventions, particularly when integrated with conventional management. These approaches are typically used alongside rather than instead of other management strategies.
Trade-offs: The evidence supporting some complementary modalities in veterinary medicine remains limited, making it difficult to predict which dogs will respond. Regular sessions represent an ongoing time and financial commitment. Finding qualified practitioners experienced in these modalities for animals may be challenging depending on location. Individual responses vary considerably, and what appears helpful for one dog may have no discernible effect on another.
Common misconceptions
"Spondylosis always causes pain and disability"
A significant proportion of dogs with radiographic evidence of spondylosis show no clinical signs of pain or functional limitation. The condition exists on a wide spectrum, from incidental findings that never affect the dog's quality of life to more significant presentations with discomfort and mobility changes. Many dogs live comfortably with extensive bony changes that are only discovered when radiographs are taken for unrelated reasons. The presence of spondylosis on an X-ray does not automatically mean the dog is suffering or requires intervention.
"Spondylosis is a form of arthritis"
Although the terms are sometimes used interchangeably in casual discussion, spondylosis deformans is technically distinct from spinal arthritis (spondyloarthropathy). Spondylosis involves osteophyte formation along the vertebral bodies, primarily affecting the ventral longitudinal ligament and disc margins, whereas true spinal arthritis involves the articular facet joints between vertebrae. The two conditions can coexist in the same dog, but they involve different anatomical structures, potentially different pain mechanisms, and may respond differently to management approaches. Accurate characterisation of which spinal changes are present helps guide understanding and management.
"Once spondylosis is diagnosed, the dog's activity must be severely restricted"
While appropriate activity management is sensible, blanket restriction of movement can be counterproductive by promoting muscle atrophy, weight gain, and joint stiffness — all of which may worsen the dog's overall condition. The goal for most dogs with spondylosis is to maintain regular, moderate activity that preserves muscle mass and joint mobility without exceeding the dog's comfort threshold. Complete rest is rarely indicated except during acute flare-ups, and many dogs with spondylosis continue to enjoy a good quality of life with thoughtful exercise management rather than strict confinement.
Recognising that spondylosis exists on a spectrum — from entirely incidental radiographic findings to a source of meaningful discomfort — can help owners contextualise their dog's experience. Observing patterns in when stiffness or discomfort appears (after rest, during cold weather, following activity) may provide useful information for understanding the individual dog's situation. The relationship between radiographic appearance and clinical significance is not always straightforward, and some dogs with dramatic-looking spinal changes function remarkably well.
Last reviewed: 24 April 2026 · Dr Alastair Greenway MRCVS