Dog Sudden Paralysis in Back Legs: What to Do Now

If your dog's back legs have stopped working in the last few hours, this is a same day emergency. Call your vet or the nearest emergency clinic now, before you finish reading. Sudden paralysis in a dog's back legs often comes from the spinal cord, as in intervertebral disc disease, where pressure on the cord causes paralysis, and with these spinal problems the clock matters, because a dog that cannot walk is an emergency and delayed treatment can leave the damage permanent.¹ Below is what the common causes look like, how to read what you are seeing, what the vet will do, and where a wheelchair fits later on.

What causes sudden hind leg weakness in dogs?

A disc problem (IVDD). Intervertebral disc disease, a problem with the cushioning discs that sit between the bones of the spine, is the most common source of paralyzing back pain in dogs, and it can leave a dog weak in the rear or unable to use the back legs at all.² It is a neurologic condition in which the protective material around the spinal cord has changed, and the result can be pain, dysfunction, or paralysis.¹ One common trigger is an injury from jumping or a hard landing: your dog is playing one moment, then suddenly cries out, and the force of the movement damages a disc, causing acute pain and pressure on the spinal cord.¹ In other cases, dogs wake up one day in pain without any obvious sign of injury.¹ About 65% of IVDD problems sit in the thoracolumbar region, which is the back.² Breeds such as Dachshunds, Pembroke Welsh Corgis, and Basset Hounds are predisposed because of their short legs and long body low to the ground,¹ and the American College of Veterinary Surgeons estimates Dachshunds alone account for 40 to 75% of all IVDD cases, often showing signs by 3 to 6 years of age.² Large dogs like Labrador Retrievers, Doberman Pinschers, and German Shepherds get a degenerative form, where discs become brittle with age and little pieces dry out and break off, damaging the spinal cord.¹

A spinal stroke (FCE). A fibrocartilaginous embolism, meaning a blockage made of disc material, happens when a small piece of disc breaks off and blocks a blood vessel supplying the spinal cord, causing paralysis of one or more legs depending on which vessel is affected.³ The classic story is a dog running around who suddenly yelps and then cannot walk, with pain that eases after a few minutes to hours.³ These typically occur after activity, and large breeds are most commonly affected, though some smaller breeds such as schnauzers are also diagnosed.³

Trauma. A fall, a car, a bad tumble off the deck. Any kind of damage to the vertebrae, or a disc moving, puts pressure on the spinal cord.¹

In an older dog, something that was building quietly. Degenerative myelopathy, a slowly worsening disease of the spinal cord, looks a lot like osteoarthritis in its early stages, and arthritis often follows hip dysplasia, meaning poorly formed hip joints, in large breeds, which makes the two hard to tell apart.⁴ More on that below.

Worth knowing. Tick paralysis is a rapidly progressive loss of muscle power caused by a toxin in a tick's saliva that attacks the nervous system, and early signs include a change or loss of voice, lack of coordination in the hind legs, a change in breathing rate and effort, gagging or coughing, and vomiting.⁵ Other possible reasons for these symptoms include spinal injuries, spinal tumors, lumbosacral stenosis (narrowing of the spinal canal low in the back), myasthenia gravis (a failure of the signal between nerve and muscle), and discospondylitis (infection of a disc and the bone on either side of it).⁴

Reading the signs at home: a quick triage

What you can see tells you a lot, so note it down before you leave for the clinic.

• Painful or painless? Dogs with back problems can be in severe pain, and even a sweet dog may snap or growl, so be patient when discomfort shows up as behavior changes.² After a spinal stroke, some dogs with more severe cases may still show subtle weakness in a limb once they have recovered, but they will not be in pain, though there can be some pain at the time of the stroke that eases within minutes to hours.³
• One leg or both? A spinal stroke can leave one leg or several paralyzed, depending on which blood vessel to the spinal cord gets blocked.³
• Dragging, knuckling or wobbling? Dragging the hind legs and looking drunk while walking are both IVDD symptoms.¹ Knuckling, where the hind paws turn under so the dog walks on its knuckles, and hind feet scraping the ground, are early signs of degenerative myelopathy.⁴
• Bladder and bowel. Pressure on the spinal cord can make it difficult for a dog to urinate or have a bowel movement.¹ A dog with severe disc disease may also be incontinent.² This is a red flag.

Red flags that mean go now, not tomorrow: no bladder or bowel control, weakness creeping up the body toward the front legs, crying when lifted, no response when a vet pinches a toe, or clear worsening over hours.

Why a dog that can't walk suddenly is an emergency

All of these symptoms require immediate veterinary attention, and the symptom that is an absolute emergency is a dog who is unable to walk.¹ An animal with sudden paralysis must be seen by a veterinarian right away.³ If surgery is recommended, do not wait: the longer you wait, the greater the chance the spinal cord degenerates to the point where it might not recover.²

What to do in the first hour

Keep your dog still and keep his spine straight. Do not let him walk it off, and do not flex or twist his back as you pick him up.

• Slide a blanket, a baking tray or a rigid board under him and lift him as one unit, body supported along its whole length. A hard sided carrier works for a small dog.
• Do not give anything from the medicine cabinet. Anti inflammatory drugs may be prescribed by your vet, and these should be used only as directed by your vet.¹
• Run your hands down both back legs and paws, checking for heat, swelling, a cut or a tick. The presence of a tick along with leg weakness appearing suddenly, within 12 to 24 hours, is diagnostic for tick paralysis.⁵
• Note the time it started, what he was doing, whether he has peed, and whether he yelped. Take a short phone video of him trying to stand.

What happens at the vet

Expect a hands on neurological exam first, then imaging if it is needed. A neurologic examination evaluates the head and cranial nerves, the gait, the neck and front legs, and the torso, hind legs, anus and tail.⁶ One standard check is the positioning test, where a paw is moved out of its normal position to see how quickly and accurately the dog puts it back.⁶ If a dog's condition is deteriorating or they can no longer walk, the vet does an assessment called deep pain, applying a firm pinch to the tip of the toe,¹ and loss of the ability to feel pain suggests moderate to severe spinal cord damage.⁶

A thorough physical exam is the first step, and for a mild case it is often all that is needed, though X-rays may be done too.² For dogs with more than mild pain, a referral to a veterinary neurologist may be recommended, where a scan can show whether the problem is disc degeneration or something else such as a cancerous growth.² Blood tests are often used to detect metabolic disorders and can identify other conditions including lead poisoning, certain infections, and myasthenia gravis.⁶ Good questions at the desk: what did the deep pain test show, does this need a neurologist tonight, and what changes if we wait twelve hours?

Treatment paths, and what the first weeks look like

Treatment splits into rest and medication, or surgery, with rehab after either.

Mild cases may be managed medically, at least initially, with restricted activity, pain medication and possibly muscle relaxants.² Rest really makes a difference, and sometimes that means a crate or playpen where the dog cannot walk around much or jump on anything.¹ Weeks, not days. If there is no response to deep pain at all, that has to be fixed immediately with decompression surgery, where a portion of the vertebrae is removed to relieve pressure on the spinal cord and allow it to heal.¹ Dogs who have spinal surgery need crate rest first, then strictly controlled exercise while they heal, and recovery can take months.²

As recovery progresses, rehabilitation may include laser therapy and underwater treadmill work, with exercises prescribed at home and a gradually increasing program of walks.² Electroacupuncture, which is acupuncture using a small electrical current, is also used for medically managed and post operative disc dogs as additional pain control, supported by clinical and research evidence.² After a spinal stroke, the best treatment is typically rehabilitation therapy and time, and most pets make a great recovery and live a normal life.³ Recurrence of a spinal stroke is very rare.³ If you want the week by week picture, we go deeper in our guide to what recovery from hind leg paralysis looks like, and in the overview of treatment options for a paralysed back end.

The daily care nobody warns you about

If your dog comes home still unable to stand, the nursing starts straight away. Dogs after spinal surgery may need help going to the bathroom, and they need to be monitored for pressure sores.² Dogs who become incontinent will need help from their families to express the bladder, meaning to empty it by gentle hand pressure.¹ These dogs need constant bathing and can get skin infections from lying in their own waste.¹ Keep bedding dry, turn a big dog regularly, use a barrier cream on anything pink, and an e collar if he starts chewing a numb leg because he cannot feel it.

For sling walking, support under the belly in front of the back legs, lift only enough to take weight off, and let him place his own feet. Owners of dogs with chronic weakness and paralysis face significantly higher caregiver burden, so this is genuinely hard, not just you.⁷ Our practical guides cover day to day nursing and toileting in detail.

How a rear support wheelchair fits in

A wheelchair is for the stage after the emergency, when the vet says controlled activity is safe and your dog's back legs still are not carrying him. If a dog's front limbs are strong enough, the vet may recommend a mobility device such as a cart to help them get around.¹ Considering a wheelchair to support the hind limbs sits alongside rugs on slick floors, ramps, a sling for standing, and booties for scuffed paws in standard management.⁸

A sling is for a few steps to the garden with you holding the weight. A chair is for longer, hands free movement, so your dog can go out, sniff, and keep his front end and core working. It supports mobility; it does not treat or slow any disease, and it does not replace rest, surgery or rehab. Whether a mobility aid such as a wheelchair helps your dog depends on their nature and temperament, and your vet can assess your dog's circumstances and help you decide on the most suitable options.⁴ If you are unsure how a chair carries a dog, see how a rear support wheelchair actually works.

Measuring and sizing

Sizing comes down to one measurement: rear leg height, from the top of the hip straight down to the toe pad, with your dog lying on his side and the leg at its natural bend. The size guide and fit finder walks you through it. If you are not sure, email a photo and your measurement to help@oldpalpets.com and a person will check it.

The OldPal Rear Support Dog Wheelchair

One chair, five sizes (Mini to XL), covering rear leg heights from 3 to 27 inches. The padded harness carries weight through the hips and chest rather than the spine, and every strap adjusts. The frame is set so the back legs hang free or lightly brush the ground, and dogs can squat and go to the bathroom while in the chair. Lightweight aluminium frame, all terrain wheels, height adjustable within each size range.

Mini, Small and Medium arrive within 1 to 2 weeks, Large and XL within 2 to 3 weeks from the day you order. Continental US only. Our Fit Guarantee means that if the size does not fit, the frame can be exchanged for the size that does. See the wheelchair.

Setting up the house so he stays steady

Non slip runners along the routes he uses most, a ramp instead of steps at the back door, and orthopaedic bedding away from draughts. Minimising time spent going up and down stairs, and jumping on and off a deck, bed or sofa, reduces the odds of a spinal injury.² Avoiding obesity matters, diet and gentle exercise such as walking and swimming are important, and the aim is to keep a dog as physically active as possible for as long as possible.⁴ Rehab professionals use at home exercises, underwater treadmill, gait training and strength building work to maintain strength, coordination and muscle mass.⁹ Ask your rehab vet which ones suit your dog, and see our notes on supporting an aging dog with a weak back end.

Frequently asked questions

Related guides

• Can a dog live well with paralysed back legs?
• When a slipped disc leaves the back legs paralysed
• Gentle exercises for a dog with paralysed back legs

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