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 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. The distinction between peripheral and central vestibular involvement carries 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. The progressive and typically non-painful nature of the decline is characteristic, and certain breeds are known to be predisposed to this condition. The lack of pain 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, steroid-responsive meningitis-arteritis, 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. 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 urgency and nature of the underlying process.

Conditions commonly associated

Degenerative Myelopathy in Dogs

Intervertebral Disc Disease in Dogs

Vestibular Disease in Dogs

Loss of coordination, particularly ataxia, can accompany vestibular disease as the disrupted balance system affects the dog's ability to coordinate limb movements and navigate effectively.

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.

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.

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.

Observing the specific characteristics of the incoordination can help characterise the type of neurological involvement. Noting whether the hind feet are placed normally or whether the animal knuckles over, whether the stride length is normal or exaggerated, whether the animal crosses its legs during walking, and whether balance is maintained during turns all provide information about which neural pathways are affected. Watching the animal on different surfaces — smooth floors versus carpet, level ground versus slopes — may reveal the severity of the proprioceptive deficit, as challenging surfaces tend to amplify underlying coordination deficits.

Last reviewed: 24 April 2026 · Dr Alastair Greenway MRCVS