Spinal stroke in dogs: FCE, treatment and recovery

Overview

The spinal cord is a structure made of nerve tissue running inside the spine. Ischaemic myelopathy means damage to it caused by inadequate blood flow. FCE is the most common cause of this type of injury in dogs.

This is a blood supply injury to the spinal cord, rather than the brain or heart. It can occur anywhere along the spinal cord. Symptom severity depends on the location and extent of the damage.

Everyday nursing care and rehabilitation of function are central to FCE treatment. The minimum functional goal of rehabilitation is for the dog to manage eating, resting and toileting. Complete neurological recovery and coping with daily life are therefore different outcomes.

Causes

A small blockage cuts off the tissue's blood supply

Intervertebral discs act as flexible cushions between the vertebrae. In FCE, material inside a blood vessel resembles material from the disc's soft centre. The blockage may be in a spinal cord artery, a vein or both. Lack of oxygen and nutrients from the blood causes tissue death.

The exact mechanism by which material enters the bloodstream from the disc is unknown. Symptoms often start during running, jumping or play. However, there is not always an obvious triggering event.

The damaged area follows the boundaries of tissue supplied by the affected blood vessel, helping explain why symptoms can be worse on one side. Spinal cord grey matter is generally more severely damaged than white matter. Bleeding can also occur in the dead tissue, although the primary problem is blocked blood flow.

Different diseases can look similar

Less commonly, an abscess or tumour may impair spinal cord blood flow by compressing a blood vessel. FCE differs from acute non-compressive nucleus pulposus extrusion, or ANNPE, in which soft disc contents strike and bruise the spinal cord without significant ongoing compression.

Risk factors

FCE occurs particularly in large and giant adult dogs. However, dogs of any size or breed can be affected. The typical age at onset is described as 3–7 years. Young dogs that are still growing can also develop it.

In published canine case series, age at diagnosis ranges from 2 months to 13 years and 5 months. In most of these studies, median age is 4–6 years. The sex distribution ranges from equal numbers to about 2.5 males for every female.

In a large compilation of 393 cases, small dogs made up 24% of patients. This describes the distribution of affected patients, rather than a small dog's likelihood of developing the condition. FCE can also occur during an ordinary walk, so it is not confined to sporting activity.

Typical symptoms

Onset is usually very rapid: a dog that was moving normally may lose function in the middle of an activity. Symptoms are often more pronounced on one side of the body.

• Coordination deteriorates and your dog staggers or stumbles.

• One or more legs suddenly become weak and do not bear weight normally.

• A paw may knuckle over, so your dog does not place it normally on the ground.

• With severe damage, a leg drags and your dog cannot move it.

• Bladder or bowel control may deteriorate.

• Your dog may cry out in pain at the start, but ongoing back pain is not typical.

Spinal cord damage in the neck may affect both the front and hindlegs. Damage lower down may affect only the hindlegs. Symptoms rarely progress beyond 12 hours. The neurological condition usually stops worsening after the first 24 hours.

Across different canine studies, symptoms worse on one side have been reported in 53–87% of dogs with FCE.

Complications and consequences

The severity of damage affects the outlook

Absence of deep pain perception is a sign of a poor recovery outlook. Equally severe symptoms on both sides are associated with a less favourable outlook. Loss of reflexes and muscle tone in the limbs or tail also worsens the outlook.

Some dogs recover completely, but many retain permanent neurological deficits. Help with emptying the bladder may be needed permanently. Prolonged lying down increases the risk of pressure sores. Incomplete bladder emptying increases the risk of urinary tract infection.

The outlook differs for severely paralysed dogs

In a 2024 follow-up study, independent walking returned in 4 of 15 dogs with severe hindlimb paralysis due to presumptive FCE. The proportion in this severely affected group was 27%. A successful outcome was defined as regaining independent walking. The small, retrospectively studied group limits the use of this percentage to predict an individual dog's recovery.

In a broader compilation of 393 FCE cases, 85% of dogs followed regained walking ability. Of those that walked again, 49.1% nevertheless had permanent neurological deficits. Injury severity and follow-up definitions influence differences in outcomes between groups.

Diagnosis at the vet

Neurological examination locates the damage

The vet establishes when symptoms began, how they progressed and whether there was an accident. A neurological examination assesses walking, reflexes and pain perception. The findings help identify which part of the spinal cord is damaged.

Blood cell counts, blood biochemistry and urinalysis help assess your dog's overall health and look for alternative diseases. X-rays can look for problems such as fractures, bone tumours or infection of the vertebrae and disc.

A blood count assesses red cells, white cells and platelets. Biochemistry assesses factors including liver and kidney function and electrolyte balance.

MRI distinguishes other causes

MRI helps distinguish a blood supply injury from conditions such as a slipped disc compressing the spinal cord or a spinal fracture. A finding consistent with FCE is a localised change in spinal cord signal without a compressing mass. Dogs have MRI under general anaesthesia.

MRI does not always show a spinal cord tissue change within the first 24–72 hours. When needed, repeat imaging at least 72 hours after symptoms start may reveal it. Ordinary X-rays are often normal in FCE.

Cerebrospinal fluid sampling may help investigate other causes, such as inflammation. In acute FCE, the sample may contain mildly increased neutrophils, a type of inflammatory cell, and protein. In a living dog, diagnosis is presumptive and based on the combined findings; definitive tissue confirmation comes from examination after death.

Contrast imaging has limitations

Myelography involves injecting contrast around the spinal cord and taking X-rays to assess its distribution. It can rule out other causes but does not show the blood supply injury itself in the same way as MRI. The injection carries a risk of further damage to already injured nerve tissue.

How certain is the diagnosis?

A definitive tissue diagnosis of FCE relies on finding fibrocartilaginous material in spinal cord blood vessels near the damaged area. Cerebrospinal fluid sampling alone does not confirm FCE. Distinguishing FCE from another sudden, non-compressive disc-related injury can be difficult even with imaging.

Treatment

Nursing care and rehabilitation are the foundation

There is no specific medicine for FCE; the vet plans supportive care and rehabilitation. The infarcted, or dead, part of the spinal cord cannot be repaired surgically. A temporary urinary catheter may be needed.

Rehabilitation may include assisted standing and walking and passive limb movement exercises. An underwater treadmill and neuromuscular electrical stimulation are possible rehabilitation methods. Exercises target the individual dog's functional difficulties, and their effects are monitored.

A physiotherapist assesses movement and function before choosing exercises. Therapeutic exercise can develop coordination, awareness of limb position, muscle strength and endurance. Methods are tailored to the individual rather than using the same ready-made programme for every dog.

Exercise on an underwater treadmill can be controlled more precisely than free swimming. Water buoyancy reduces the load on the dog's joints during exercise. Water resistance is also used during training. The physiotherapist shares treatment effects and follow-up observations with the vet.

Individually selected massage and stretching exercises may also form part of the rehabilitation programme.

Early changes and a long recovery

Many dogs show the first improvement within 5–14 days.

Mildly affected dogs may improve considerably within 1–2 weeks. If there is no improvement in the first 2 weeks, the outlook worsens. In one follow-up study, voluntary movement returned at 6 days, with a range of 2.5–15 days.

In the same study, unaided walking returned at 11 days, with a range of 4–136 days. The best level of recovery was reached at 3.75 months, with a range of 1–12 months from symptom onset.

Prevention

There is no known reliable way to prevent FCE.

However, care of an affected dog can prevent complications of immobility.

Soft bedding and regular changes of position help prevent pressure sores.

Noticing urinary accidents and keeping the skin clean and dry reduce urine-related skin irritation.

Maintaining muscle function is one of the aims of exercise.

When urine builds up in the bladder, ensuring it empties is also part of managing infection risk. An unusual urine smell or colour may prompt investigation for infection.

Important for dog owners

Record when symptoms began, any accident and which side weakened first. Bring a description of how your dog walked and whether it can urinate to the appointment.

A support harness or sling may make movement easier.

If the bladder needs manual emptying, a veterinary professional will teach you the technique.

Agree how home care will be shared and make sure you can safely help your dog with toileting too.

The home physiotherapy programme is also adapted to the resources you have available.

Contact your vet immediately if your dog's condition starts to deteriorate again.

Keep a rehabilitation diary recording whether your dog gets up independently, needs support and requires help with toileting. Note skin changes and urinary accidents too. This allows everyday function to be compared with earlier observations at appointments.

Neurological examination at follow-up visits may reveal small changes that go unnoticed at home.

A weak dog may need trunk support to remain upright enough to eat and drink. Improved walking alone does not always reflect every rehabilitation goal: continence and other everyday activities may need separate support.

Frequently asked questions

Can a dog have a spinal stroke without ongoing pain?

Yes: a dog may cry out at the start, but pain often disappears quickly. Limb weakness or paralysis may nevertheless remain. The sudden, severe symptoms need urgent investigation. MRI helps rule out other causes of acute spinal cord injury.

Is FCE the same as a slipped disc?

In FCE, material believed to come from a disc blocks a spinal cord blood vessel. A compressive slipped disc is a different cause of spinal cord injury. Symptoms can look similar, so diagnosis requires consideration of alternatives and often MRI. FCE treatment relies on nursing care and physical rehabilitation.

Can my dog walk normally again?

Complete recovery is possible, but many dogs retain permanent deficits. Recovery depends on the location and severity of spinal cord damage. Good quality of life is possible even with a residual neurological deficit. Absence of deep pain perception is associated with a poorer outlook.

Does a spinal stroke need surgery?

Surgery cannot repair tissue damaged by a spinal stroke. Treatment focuses on nursing care and physical rehabilitation. Investigations first rule out conditions such as a slipped disc compressing the spinal cord, for which treatment is assessed separately. Assisted walking and an underwater treadmill may support recovery of mobility.

Does FCE often recur?

Recurrence is very rare. However, weakness in one or more limbs may remain after the first episode. Recovery usually progresses over weeks or months. A lasting functional deficit does not necessarily prevent good quality of life.