Dog Back Legs Giving Out: What To Do Right Now

Sudden or worsening hind end weakness is always a reason to call your vet, and a dog back legs giving out all at once is an emergency. Rear leg weakness is a sign rather than a diagnosis: in Doberman Pinschers, two quite different hind leg problems, one with shifting of the hind legs while standing and one with a crouched bunny hopping gait, both involved hind limb weakness, muscle wasting and fatigue, and only genetic testing could show they shared the same underlying cause, because the outward picture alone was not enough to tell the diseases apart.¹ Your job today is simple: keep your dog safe from falls, get a vet exam booked, and write down exactly what you saw and when. For the bigger picture, start with our parent guide, dog losing the use of back legs.

What to do when dog back legs giving out happens today

Take a breath and work through this order.

• Sudden weakness, dragging, or no movement at all: go now. This is an emergency vet visit, not a wait and see.
• Stop the falls. Block stairs, add rugs on slick floors, and use a towel under the belly for support outside.
• Write a timeline. When did it start? One leg or both? Did it come on over hours, days or months?
• Film a short video of your dog walking on a flat, non slip surface.
• Note everything else. Appetite, drinking, toileting, pain sounds, other illnesses your dog is being treated for.

Do not give any human medication or leftover prescription. Diagnosis and treatment belong to your vet.

Why are dogs back legs giving out: the usual suspects

There is no single answer, which is why the exam matters. The conditions vets see behind a weak back end include:

Disk problems in the spine. In one study, dogs were treated for sudden hind leg weakness or paralysis that left them unable to walk, assumed or proven to be caused by a herniated (slipped) disk between the vertebrae.² Signs can also return later: owners reported a recurrence of disk herniation signs in about 30% of surgically treated dogs and 13% of dogs treated with chondroitinase ABC, an enzyme injected into the disk.²

Joint and orthopedic disease. Rupture of the cranial cruciate ligament, the main stabilising ligament inside the knee, is the most common canine orthopedic condition.³ In one review of dogs having surgery for a failed cruciate ligament, 36.3% also had hip dysplasia, meaning poorly formed hip joints,⁴ and among those dogs, 74.0% showed signs of osteoarthritis, the wear and inflammation that follows in an unstable joint.⁴

Blood supply problems. In a study of dogs diagnosed with ischemic neuromyopathy, in which nerve and muscle are damaged because their blood supply is cut off, 38 of 42 (90.5%) had hind limb involvement, and 35 of 42 (83.3%) had another illness as well, most commonly a kidney disease that leaks protein.⁵

In one dog, a fungal inflammatory mass growing inside the spinal cord caused sudden, worsening hind limb weakness and wobbliness that progressed to paralysis, and surgery plus antifungal treatment allowed the dog to walk again.⁶ A four-year-old Golden Retriever had slowly worsening hind leg weakness that was not painful, caused by a fluid-filled lesion pressing on the spinal cord.⁷ Another dog showed mild hind leg weakness linked to a mass involving the spine.⁸

Nerve and muscle disease, sometimes inherited. In Doberman Pinschers, one form involves repeated lifting and shifting of the hind legs while standing and frequent sitting, while a more severe form shows a crouched stance and bunny hopping, and dogs with either pattern show hind leg weakness, muscle wasting and fatigue that can spread to the front limbs.¹

For a fuller breakdown, read what causes a dog's back legs to give out. Breed specific patterns are covered in our guide to back legs giving out in boxer dogs.

When a dog's back legs give out suddenly versus slowly

How fast signs come on matters for outcome, not just for urgency: in dogs with hind limb ischemic neuromyopathy, a more gradual progression to peak severity was associated with a better chance of surviving to discharge.⁵

One Miniature Schnauzer was seen for sudden, worsening hind leg weakness and wobbliness, was unable to walk at the examination, and became completely paralysed in the hind legs within the following 24 hours.⁶ If your dog's back legs gave out this fast, treat it as an emergency.

Slow. A gradual slide is easy to dismiss as a vague old-age problem, and that is the trap. One seven-year-old dog had more than six months of slowly worsening hind leg weakness, a limp tail and spinal pain despite treatment from the family vet.⁹ The authors noted that the dramatic and irreversible changes seen in this dog might have been avoidable, or at least reduced, with earlier diagnosis and aggressive surgical treatment.⁹ If your dog's rear legs are giving out a little more each month, book the appointment now rather than at the next annual check.

Dog back legs collapsing at home: falls, stairs and slips

Once the back end is unreliable, stairs become the danger point. One study reviewed 61 dogs brought to emergency centres after falling down the stairs.¹⁰ Mild, moderate and severe myelopathies, meaning spinal cord problems ranging from wobbly walking to full hind leg paralysis, occurred in 18%, 11% and 5% of cases.¹⁰ Limb injuries were also common, with lameness in 28% and a broken bone in 13%.¹⁰

Reassuringly, many of the injuries in those 61 dogs were mild, and 74% were discharged from the hospital.¹⁰ It can sometimes be hard to tell whether the fall down the stairs caused the injury or whether an underlying problem, such as a spinal cord disease or a weakened bone, caused the fall in the first place.¹⁰ Age alone does not explain the outcome either: in that group there were no differences between older and younger dogs in the odds of head, limb or spinal cord injury, or in how severe the injuries were.¹⁰

Gate the stairs, lay runners on hard floors, and keep nails and paw hair trimmed for grip.

Treatment, recovery and honest expectations

Your vet decides the path, and it depends entirely on the cause. Our companion article walks through the options your vet may discuss: how to treat collapsing back legs in dogs.

There is real room for hope. In dogs with hind limb ischemic neuromyopathy, 7 of 28 with long-term follow-up recovered fully, including 2 of 16 dogs that were initially unable to walk, which shows that recovery is possible even when the nerve damage looks severe at first.⁵ In the stair fall study, 45 of 61 dogs (74%) went home from the hospital.¹⁰

Where a wheelchair fits in

A wheelchair supports mobility while your vet handles the medical side.

The OldPal Rear Support Dog Wheelchair is built for dogs with weak or failing back legs. 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. The frame is lightweight aluminum with all-terrain wheels, and each frame adjusts in height within its range.

It comes in five sizes, Mini through XL, covering rear leg heights from 3 to 31 inches. Sizing uses one measurement: rear leg height, from the top of the hip straight down to the toe pad, taken with your dog lying on their side and the leg at its natural bend.

Measure your dog tonight and check the fit finder on the size guide. Then see the dog wheelchair for back legs. If you are unsure, email help@oldpalpets.com with a photo and your measurement and a person will answer. Our Fit Guarantee means that if the size does not fit, send it back and we replace it with the size that does, and return shipping is your only cost. Most orders arrive within 2 to 3 weeks, and we ship to the continental US only.

Frequently asked questions

Related guides

• Dog losing use of back legs: dog back legs giving out
• What causes dogs back legs to give out
• Treatment for dogs back legs giving out
• Boxer dog back legs giving out
• How to measure your dog for a wheelchair

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