CONDITION
Intervertebral Disc Disease (IVDD)
Intervertebral disc disease describes a group of conditions in which the cushioning discs between the bones of the spine become damaged, degenerate, or shift out of position. When this happens, the disc material can press on the spinal cord or the nerves that branch from it, interfering with the signals that travel between the brain and the rest of the body. The result can range from discomfort and stiffness to paralysis of the limbs with loss of bladder control. Owners often notice a change in how their dog moves or holds itself: reluctance to jump, a hunched posture, unsteadiness in the back legs, or dragging of the paws. In some cases the change is gradual; in others it appears quite suddenly. Certain breeds, particularly those with long backs or short legs, are seen more frequently, though the condition can occur in any dog. This page explores what may be observed when disc disease is present, the mechanisms that lead to pressure on the spinal cord, how the problem is investigated using imaging and examination, and the range of approaches used to manage it, both supportive and surgical. The course and outcome depend on the severity of nerve involvement, the speed of onset, and the individual animal.
Why this matters now
IVDD is common in certain breeds, particularly Dachshunds, French Bulldogs, Beagles, Corgis, and Cocker Spaniels. An estimated 19% to 24% of Dachshunds show signs of IVDD during their lifetime. In these breeds disc extrusion can occur from as early as one to two years of age, and onset is on average between three and six years. Other breeds more typically develop disc problems between five and twelve years of age. Episodes may occur suddenly or develop gradually, and in the most sudden cases hind leg paralysis develops in less than one hour.
Signs tend to worsen in a recognised order: back or neck pain, then a wobbly gait, then loss of hind leg movement, usually with loss of the ability to urinate, and finally loss of pain sensation in the feet, at which point the outlook can be guarded to poor. Type I disc disease involves sudden disc rupture with acute onset of signs. Type II involves gradual disc bulging with more slowly progressive signs. Some dogs experience single episodes that resolve, whilst others have recurrent problems or progressive deterioration. The location of the affected disc determines which body regions are affected. In most studies between 9% and 17.5% of dogs with Type I disc extrusion that have lost pain sensation go on to develop progressive myelomalacia, a complication that is usually fatal.
Signals & patterns
Early signals
Reluctance to move or change position
Dogs may be unwilling to jump, climb stairs, or move their head and neck normally.
Crying out when touched or moved
Pain may cause vocalisation, particularly when the spine is manipulated or pressure is applied.
Hunched or tense posture
Dogs often arch their back or hold their neck stiffly when experiencing spinal pain.
Shaking or trembling
Pain and muscle tension may manifest as visible trembling.
Later signals
Weakness or wobbliness in the hind legs
Compression of the spinal cord affects nerve function, causing coordination problems or weakness.
Dragging one or both back feet
More severe spinal cord injury causes loss of the ability to consciously control limb placement.
Inability to walk
Significant spinal cord damage can result in paralysis of the affected limbs.
Loss of bladder or bowel control
Severe spinal cord injury may affect the nerves controlling urination and defecation. Dogs that lose hind leg movement usually also lose the ability to urinate, and the bladder may then need to be emptied by hand three to four times a day.
Loss of pain sensation in the feet
This is the last stage in the usual order of progression. A leg pulling back when a toe is pinched can be a reflex alone, so this cannot be judged at home. It is assessed during a neurological examination, and recovery rates are markedly lower once pain sensation is lost.
Click to read about the biological mechanisms
How this is usually investigated
Assessment of suspected IVDD combines neurological examination with advanced imaging to localise the problem and guide treatment decisions.
Neurological examination
Radiographs
MRI scan
CT scan or myelography
Blood tests
Options & trade-offs
Treatment approach depends on severity of signs, which specific disc is affected, and how quickly the condition has progressed. Options range from conservative management to surgical intervention.
Conservative management
Strict rest, pain management, and anti-inflammatory medications.
Trade-offs: May be appropriate for first-time episodes with pain only or mild neurological signs. In pooled studies about 80% of dogs that had pain only and could still walk recovered with conservative management. Requires at least four weeks of restricted activity, ideally in a crate. Does not remove the disc material, and signs return in 15% to 66% of conservatively managed dogs across studies.
Surgical decompression
Removal of disc material compressing the spinal cord.
Trade-offs: Typically recommended for more severe signs or cases not responding to conservative treatment. Outcome depends on severity at presentation. In pooled studies in the 2022 ACVIM consensus statement, about 93% of dogs with thoracolumbar disc extrusion that were paralysed but could still feel pain in their feet recovered the ability to walk after surgery, against about 60% with conservative management. Once pain sensation was lost, about 61% recovered after surgery and about 21% without it. Requires specialist surgical facilities.
Physical rehabilitation
Structured exercises, hydrotherapy, and physical therapy.
Trade-offs: Used alongside both surgical and conservative treatment, with the aim of maintaining muscle mass and joint movement. In the 2022 ACVIM consensus statement, intensive in-hospital rehabilitation after surgery did not improve recovery of walking compared with basic passive movement and assisted walking.
Mobility support
Carts, slings, and assistive devices for dogs with significant deficits.
Trade-offs: Can maintain quality of life for dogs with permanent weakness. Requires owner commitment to daily management. Some dogs adapt remarkably well.
Common misconceptions
"IVDD only affects Dachshunds"
Whilst Dachshunds are particularly predisposed, IVDD is common in many breeds including French Bulldogs, Beagles, and Corgis. Any breed can be affected.
"Back pain means the dog will become paralysed"
Many dogs experience only pain without progressing to weakness. The spectrum of severity is wide, and many cases resolve with appropriate management.
"Paralysed dogs should be euthanised"
Whilst severe IVDD is serious, many paralysed dogs recover function with appropriate treatment. The outlook depends mainly on whether pain sensation in the feet is still present. Even those with permanent deficits can often maintain good quality of life with supportive care.
Related conditions
Fibrocartilaginous Embolism (FCE)
Fibrocartilaginous embolism can present with sudden-onset weakness or paralysis similar to that seen in acute disc herniation, though the mechanism differs: FCE involves blocked blood flow to the spinal cord rather than direct compression. Distinguishing between the two often requires advanced imaging and careful assessment of the pattern and progression of signs.
The page on this condition is being checked again and is offline for now.
Wobbler Syndrome (Cervical Spondylomyelopathy)
Wobbler syndrome involves compression of the spinal cord in the neck region, often through a combination of disc material, bone changes, and ligament thickening, and can produce neurological signs in the limbs similar to those seen in intervertebral disc disease affecting the cervical spine. The two conditions share overlapping mechanisms (disc degeneration and spinal cord pressure), though wobbler syndrome typically develops more gradually.
Lumbosacral Stenosis
Lumbosacral stenosis describes narrowing and nerve compression at the junction between the lower back and pelvis, and while the site differs from the thoracolumbar region most often affected by disc disease, both conditions involve degenerative changes that place pressure on nerve tissue. Owners may observe similar reluctance to move, stiffness, or altered gait, though lumbosacral stenosis often presents with pain on rising or difficulty jumping rather than acute paralysis.
Discospondylitis
Discospondylitis involves infection of the intervertebral disc and adjacent bone, and can present with back pain, reluctance to move, and sometimes neurological signs that may initially resemble those of disc herniation. Imaging and clinical course help distinguish infection from the mechanical compression typical of degenerative disc disease, though both conditions affect the same anatomical structures.
The timeline of the signs and any trigger are useful information for the examining clinician. Whether the dog can stand and walk unaided can be seen at home. Whether it can still feel its feet cannot be judged at home: a leg that pulls away when a toe is pinched may be showing a reflex only, and pain sensation is judged from a repeatable conscious response, such as crying out, looking round or moving away, to firm pressure applied during a neurological examination. Evidence on prevention is limited. In a survey of 2,031 Dachshunds, body condition score and bodyweight were not associated with IVDD, dogs exercised for more than one hour a day had lower odds of IVDD, and the study design could not show cause and effect.
Last reviewed: 9 October 2026 · Dr Alastair Greenway MRCVS