SYMPTOM
Loss of coordination in hind legs
Unsteady or crossing movement of the back legs, affecting balance and the ability to walk in a straight line.
Spinal Cord Disease
Conditions affecting the thoracolumbar spinal cord are among the most common causes of hind limb incoordination. Intervertebral disc disease, degenerative myelopathy, spinal cord tumours, fibrocartilaginous embolism, and spinal stenosis can all disrupt the neural pathways that coordinate hind limb movement. The incoordination reflects impaired transmission of proprioceptive information (the signals that tell the brain where the limbs are positioned in space) and of the motor commands that control precise limb placement. The specific pattern of ataxia may help localise the level of spinal involvement.
Vestibular
The vestibular system, which governs balance and spatial orientation, can produce incoordination affecting the hind limbs when it malfunctions. Peripheral vestibular disease, affecting the inner ear, and central vestibular disease, affecting the brainstem, can both produce ataxia. Vestibular ataxia often produces a characteristic swaying or leaning gait, sometimes with a head tilt and circling, that differs from the proprioceptive deficits seen with spinal cord disease. Peripheral and central vestibular involvement carry different implications.
Cerebellar
The cerebellum coordinates the timing, rate, and force of movements, and conditions affecting it produce a distinctive type of incoordination characterised by dysmetria: movements that overshoot or undershoot their targets. Cerebellar ataxia produces a hypermetric gait where the limbs are lifted too high and placed too forcefully, creating a characteristic bouncing or goose-stepping quality to the movement. Cerebellar conditions may be congenital, infectious, inflammatory, or neoplastic in origin.
Degenerative
Progressive degenerative conditions, particularly degenerative myelopathy, produce gradually worsening hind limb incoordination over months. The condition typically begins with subtle ataxia and proprioceptive deficits that progress to more obvious incoordination, weakness, and eventual loss of hind limb function. Certain breeds are known to be predisposed to this condition. The progressive and typically non-painful nature of the decline is characteristic, and distinguishes degenerative myelopathy from many other causes of spinal cord dysfunction.
Inflammatory or Infectious
Inflammatory conditions affecting the spinal cord or brain, including granulomatous meningoencephalomyelitis and infectious myelitis from organisms such as Neospora or Toxoplasma, can produce hind limb incoordination through direct damage to neural tissue. These inflammatory causes may produce a more acute or subacute onset than degenerative conditions and may be accompanied by pain, fever, or signs of systemic illness depending on the specific condition and its location.
Why timing matters
Early observation
Early loss of coordination in the hind legs may manifest as subtle changes that are easily overlooked. The animal may occasionally scuff its hind toenails, take slightly wider turns, cross its hind legs when walking, or appear mildly unsteady on slippery surfaces while moving normally on grass or carpet. These early proprioceptive deficits often precede obvious gait abnormalities and may be the first clinical evidence of spinal cord or neurological involvement. Noting which surfaces and activities reveal the incoordination, and whether it is constant or intermittent, provides useful early characterisation.
Later presentation
As incoordination progresses, the gait abnormalities become more consistent and more pronounced. The animal may weave, sway, or stagger with the hind end, drag one or both hind feet, cross its legs frequently, or fall during turns. The hind limbs may appear to move independently of each other and of the body's trajectory, producing a disconnected, uncoordinated gait. At this stage, the animal may struggle with stairs, uneven terrain, and transitions between surfaces. Secondary consequences including worn toenails from dragging, skin abrasions on the dorsal paws, and muscle atrophy from reduced use may develop alongside the primary neurological deficit.
The rate and pattern of progression carry significant diagnostic implications. Degenerative myelopathy typically progresses slowly over many months, with a relentless but gradual decline. Disc-related spinal cord compression may worsen acutely, fluctuate, or progress in a stepwise fashion. The American College of Veterinary Surgeons describes the sequence in disc disease as back or neck pain, then a wobbly hind end with crossing hind feet, then complete loss of hind limb movement, usually with loss of the ability to pass urine, and finally loss of pain perception. In the pooled studies of acute thoracolumbar disc extrusion in the 2022 ACVIM consensus statement, about 93% of dogs with paralysed hind legs that still had deep pain perception recovered after surgery and about 60% with medical management. Once deep pain perception was lost, the figures were about 61% and 21%. Inflammatory conditions may show rapid deterioration over days or may fluctuate with the activity of the underlying inflammatory process. Fibrocartilaginous embolism produces sudden onset with subsequent stabilisation and often partial improvement. The speed of progression helps characterise the nature of the underlying process.
Conditions commonly associated
Degenerative Myelopathy in Dogs
Degenerative myelopathy progressively damages the nerve fibres in the spinal cord that carry coordination signals to the hind legs, so movements become increasingly unsteady and poorly timed as the condition advances.
Intervertebral Disc Disease in Dogs
When displaced disc material presses on the spinal cord or nearby nerve roots, the nerve signals controlling the hind legs are disrupted, producing an unsteady, crossing gait.
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Vestibular Disease in Dogs
Ataxia can accompany vestibular disease, as the disrupted balance system affects the dog's ability to coordinate limb movements and keep its balance.
Syringomyelia (CM/SM)
Coordination problems in the hind legs can develop as syringomyelia damages spinal cord pathways.
Intervertebral Disc Disease (IVDD)
Proprioceptive deficits cause ataxia and difficulty placing feet normally.
Wobbler Syndrome (Cervical Spondylomyelopathy)
Cervical spinal cord compression classically produces a wobbly, uncoordinated gait that is most obvious in the hind legs.
Border Collie Collapse
During an episode brought on by strenuous exercise the dog sways and staggers, may drag or cross its legs, and may fall to the side. The fore and hind limbs are commonly affected together.
Exercise-Induced Collapse
As an episode progresses, faulty nerve signalling to the muscles produces an uncoordinated, swaying hind-end gait.
Granulomatous Meningoencephalomyelitis (GME)
Where this condition involves the spinal cord, the inflammation can make the hind legs weak and unsteady.
When to explore further
Incoordination that progresses noticeably over days to weeks, with a clear trend of worsening function, may suggest an active process that is progressively affecting the spinal cord or nervous system rather than a stable condition.
When hind limb incoordination is accompanied by a head tilt, abnormal eye movements, circling, or nausea, these additional signs may suggest vestibular involvement rather than a spinal cord localisation, and this distinction helps characterise the level of the neurological system affected.
Loss of coordination that appears suddenly, with normal function one moment and obvious ataxia the next, represents a different pattern from gradual onset and may suggest a vascular, traumatic, or acute compressive event rather than a slowly progressive condition. Where the cause is a disc extrusion, the wobbly stage can be followed by complete loss of hind limb movement and then by loss of pain perception.
When incoordination is asymmetric, clearly worse on one side than the other, the lateralisation may help localise a focal lesion affecting one side of the spinal cord or brain more than the other.
Hind limb incoordination developing alongside loss of bladder or bowel control may suggest that the neurological process has progressed to involve the autonomic pathways controlling these functions, which travel in close proximity to the motor and proprioceptive pathways in the caudal spinal cord. In disc disease the ability to pass urine is usually lost at the same stage as hind limb movement, a more severe grade of spinal cord injury than incoordination alone.
The specific characteristics of the incoordination help characterise the type of neurological involvement. Whether the hind feet are placed normally or knuckle over, whether the stride length is normal or exaggerated, whether the legs cross during walking, and whether balance is maintained during turns all provide information about which neural pathways are affected. The deficit is often more apparent on smooth floors than on carpet, and on slopes than on level ground, as challenging surfaces tend to amplify underlying coordination deficits. Two things cannot be judged from the gait at home: where in the nervous system the problem lies, and whether deep pain perception is intact. A leg that pulls away from a pinch may be showing a spinal reflex only, which is not the same as the dog feeling the pinch.
Last reviewed: 9 October 2026 · Dr Alastair Greenway MRCVS