Sudden Back Pain or Wobbly Legs: IVDD, and When It Is an Emergency
Disc disease can take a dog from sore back to paralysed in hours. The signs, what deep pain means, surgery versus rest, and the 24-hour myth.
Written by thecanineledger
If your dog suddenly can’t stand, can’t walk, is dragging or knuckling its back legs, or seems unable to feel them: phone a vet and go now. Keep your dog as still as you can, and don’t give any painkiller of your own. If your dog has back or neck pain but is still walking normally, phone your vet today.
In a survey of 2,031 dachshunds, 15.7% had been diagnosed with intervertebral disc disease by a vet (Packer et al., Canine Genetics and Epidemiology 2016). In one variety, the standard smooth-haired, it was 24.4%.
That is roughly one dog in six. For owners of short-legged breeds, disc disease is not a rare event. It is something to plan for.
While most owners of these breeds have heard of “slipped discs”, far fewer know how quickly a sore back can become a dog who can’t walk, or what a vet means by “deep pain”. This page covers the signs, how severity changes the odds, what the evidence says about surgery and rest, and one deadline you will read online that the evidence does not support.
1. What it is, and which dogs get it
Between each pair of bones in the spine sits a disc, a cushion with a firm outer ring and a softer centre. In disc disease, that disc degenerates and its contents bulge or burst into the spinal canal, where they press on the spinal cord.
In some breeds this starts very early. The 2022 consensus statement from the American College of Veterinary Internal Medicine (ACVIM) explains that in “chondrodystrophic dog breeds”, the short-legged breeds, a gene variant “is associated with dramatically accelerated intervertebral disc degeneration” (Olby et al., Journal of Veterinary Internal Medicine 2022). It also notes that disc extrusion in the middle of the back is “the most common cause of acute paraparesis and paraplegia in dogs”: sudden weakness or paralysis of the back legs.
The Merck Veterinary Manual’s owner page names the breeds most often affected: “particularly the Dachshund, Beagle, Shih Tzu, Lhasa Apso, and Pekingese”. In these breeds, it says, a herniated disc “can occur suddenly, as early as 1 to 2 years of age” (Merck, Disorders of the Spinal Column and Cord in Dogs). Larger dogs can get disc disease too, but usually later in life, and with signs that worsen slowly.
The consensus also lists French bulldogs alongside dachshunds as breeds predisposed to disc extrusion.
→ Choosing a Breed or a Mix: The Health Data Breeders Don’t Lead With
2. The signs, from mild to emergency
Merck describes the two most common sites. A disc in the neck “leads to neck pain, stiffness, and muscle spasms”. A disc in the middle of the back “leads to back pain, and possibly curvature in the spine and a reluctance to move. Neurologic signs range from a loss of motor control in the hind legs to paralysis and incontinence.”
The consensus statement grades dogs by how badly they are affected. In plain terms, the steps are:
| What you see | What a vet may call it |
|---|---|
| Back pain (hunched, crying when picked up, won’t jump or climb), but walking normally | Spinal pain only, ambulatory |
| Wobbly or weak back legs, but still walking | Ambulatory paraparesis |
| Can’t walk without help, but can move the back legs | Non-ambulatory paraparesis |
| Can’t move the back legs at all | Paraplegia |
| Can’t move the back legs and has lost deep pain sensation | Paraplegia, deep pain negative |
A dog can move down this ladder. That is why the consensus says that short-term hospitalisation for one to two days “should be considered in dogs with progressive signs managed medically, to monitor for deterioration in neurological status.”
Any dog that can’t walk, or is getting worse, needs a vet now. So does any dog that can’t pass urine. Merck lists incontinence among the neurological signs, and the consensus describes “retention incontinence”, where the bladder fills but the dog can’t empty it.
Our note: If your dog is walking but wobbly, call your vet straight away.
→ Emergency Signs in Dogs: When to Go Now, Not Tomorrow
3. “Deep pain”: the question that changes the odds
If your dog can’t move their back legs, the vet will test whether they can still feel a strong pinch to a toe. Merck explains that it is important “to determine whether pain sensation is present by pinching the toe or tail and watching whether the dog makes a behavioral response, such as a bark or turn of the head.” Leave this test to the vet. It is the single most important finding for the outlook, and it is easy to misread at home.
The consensus statement pooled published outcomes by severity. These figures are the share of dogs with a successful outcome:
| Severity on arrival | Managed with rest and medication | Managed with surgery |
|---|---|---|
| Spinal pain only, walking | 80% (115 dogs) | 98.5% (336 dogs) |
| Can’t walk, can move legs | 81% (131 dogs) | 93% (341 dogs) |
| Paralysed, deep pain present | 60% (67 dogs) | 93% (548 dogs) |
| Paralysed, deep pain absent | 21% (48 dogs) | 61% (502 dogs) |
Read this table with care. These are pooled numbers from many studies, not a trial. Dogs given surgery may differ from dogs given rest in ways that affect the outcome. The consensus also notes that “Recovery with medical management is prolonged and less complete compared to surgery” for paralysed dogs with deep pain.
Even so, the pattern is consistent. The more severe the signs, the bigger the gap between surgery and rest.
4. Surgery or rest
The consensus statement’s recommendations follow the table:
- Walking dogs “can be managed successfully medically; however, consideration should be given to risk of recurrence.”
- Dogs who can’t walk, or are paralysed but feel deep pain: “Surgical management for these dogs is recommended.”
- Paralysed dogs without deep pain: “success with medical management is largely poor”, and “Surgical management is recommended.”
If surgery isn’t possible, that is not the end. Surgery means referral, imaging and cost, and not every owner can do it. The consensus is clear that “When dogs cannot be treated surgically, a medical treatment attempt is reasonable for all grades of injury severity unless there is clinical evidence of PMM”, a complication described below. Ask your vet what rest and medication can realistically achieve for your dog.
→ How Pet Insurance Works: Policy Types, Excess, Co-Insurance and Waiting Periods
The 24-hour rule
You will often read that a paralysed dog must have surgery within 24 hours, or the chance is gone. The Merck owner page, last fully reviewed in 2018, says something similar: “If surgery is delayed for more than 24 hours after pain perception is lost, the chances of recovery decrease.”
The 2022 consensus looked at this question directly. Its conclusion: “taken as a whole, the current literature does not generally support the use of a specific timeline for urgent surgical decompression, even for DPN dogs that are paraplegic at the time of presentation.” DPN means deep pain negative. It adds that “Surgical treatment should not be declined simply because the dog has been paralyzed for an extended period”, because some dogs paralysed for more than a week before surgery still walked again.
That is not a reason to wait. The consensus also notes that “delayed decompression may result in a longer time to achieve postoperative ambulation”. And there is a separate danger. In some badly injured dogs, the damage to the spinal cord spreads. This is progressive myelomalacia (PMM). The consensus describes paralysis that climbs the body, and “ultimately thoracic limb involvement and ventilatory failure”: the front legs and then breathing are affected. In one study it cites, of paralysed dogs without deep pain, 21.5% of those treated with one type of surgery alone “died of presumed PMM.” It “usually develops within days (24 hours up to 14 days)” of the injury, and “is not always apparent at time of presentation.” In studies of paralysed dogs without deep pain, 10% to 33% developed it.
What the evidence supports is this: go now, and if you can’t reach a specialist on day one, a dog who arrives on day two or later has not necessarily lost their chance.
Our note: The 2022 consensus and Merck’s 2018 owner page differ on the 24-hour point. The passages we read give no overall death rate for PMM.
5. If your dog is managed with rest
Rest means real rest. The consensus recommends “A least 4 weeks of restricted activity”, with “confinement to a restricted area (crate ideally, or a small room without furniture) except for when performing rehabilitation exercises or outdoor toileting.” It adds: “There should be no off-leash walking, no jumping on or off furniture and no access to stairs during this time.”
The honest caveat. The evidence for this rule is weak. In a study of 223 dogs, the length of rest, from none to more than four weeks, “was not associated with outcome.” The four weeks is a reasoned recommendation, not a proven one. We would still follow it, because the alternative has no evidence either.
Medication is your vet’s call. The consensus recommends anti-inflammatory pain relief for dogs managed medically, “provided there is no specific contraindication”. It also says that “The use of concurrent corticosteroids or multiple NSAID formulations in combination should be avoided”, and that there is limited evidence linking steroids to poorer outcomes. Never give your dog a human painkiller. Several are dangerous to dogs. If you have already given one, tell your vet what, how much and when.
→ Ibuprofen, Paracetamol and Other Human Painkillers
Watch for signs that rest isn’t working. The consensus says that needing pain relief beyond the first week, despite proper rest, “should be considered as a possible indication for further investigation and potentially surgical management.” Any dog that gets worse during rest needs to be seen again.
It can come back. The consensus gives recurrence rates of 15% to 66% for medically managed dogs, much higher than after surgery that includes removing disc material at the affected site. Merck’s owner page gives 30% to 40%.
Acupuncture is not a substitute. The consensus says there is some low-level evidence for acupuncture as part of medical management, but that it “currently is not recommended as an alternative to surgical management.”
Our note: Ask your vet to show you how to carry and toilet your dog on crate rest. Bladder care needs a vet’s guidance, and the consensus says the technique “should be tailored to the dog”.
6. Can you prevent it?
Not reliably, from what we found. The DachsLife survey asked owners of 2,031 dachshunds about diet, exercise, stairs and furniture.
- Exercise. Dogs exercised for under 30 minutes a day had higher odds of disc disease; dogs exercised for more than an hour had lower odds.
- Jumping on furniture. Surprisingly, dogs not allowed to jump on and off furniture had higher odds. The authors suggest this “may be a case of reverse causality, where dogs who have experienced an IVDD episode are no longer allowed to jump on and off furniture.”
- Neutering and age. “Older dogs and neutered dogs were at increased odds of IVDD.”
The key word is odds. This was a survey at one point in time, so it cannot show cause. The authors call their lifestyle findings “hypothesis-generating for future prospective studies.” The exercise finding may also be reverse causality: dogs who have had an episode are exercised less.
What this means for you. We found no evidence that stopping a healthy dachshund from jumping prevents disc disease. We found no evidence that it causes it either. If you own a predisposed breed, the most useful thing you can do is know the signs, and know where your nearest emergency vet is.
Our note: The neutering association comes from one survey, and the timing of neutering relative to diagnosis is unclear. It isn’t advice.
7. What we could not verify
| Commonly said | What we found |
|---|---|
| “Surgery must happen within 24 hours or the dog won’t walk again” | Not supported by the 2022 ACVIM consensus, which found no specific timeline, even for the most severe dogs. That doesn’t make waiting safe. |
| “A paralysed dog without deep pain will never walk again” | Contradicted. In pooled studies, 61% recovered with surgery, and 21% with medical management. |
| “Strict crate rest for six weeks is proven to work” | Not proven. The consensus recommends at least four weeks, on low-level evidence. In one study, rest length was not linked to outcome. |
| “Jumping off the sofa causes IVDD” | We found no evidence it does. In the DachsLife survey, dogs not allowed to jump had higher odds, possibly because of reverse causality. |
| “Stairs cause IVDD” | We found no evidence it does. DachsLife found a trend the other way: dogs that climbed a flight of stairs daily had lower odds, though the authors call it non-significant at their threshold. |
| “Acupuncture can replace surgery” | Not recommended as an alternative by the consensus. |
Sources
- Olby NJ, Moore SA, Brisson B, Fenn J, Flegel T, Kortz G, Lewis M, Tipold A. ACVIM consensus statement on diagnosis and management of acute canine thoracolumbar intervertebral disc extrusion. J Vet Intern Med 2022. doi:10.1111/jvim.16480: consensus statement from a specialist college panel; most recommendations rest on observational studies, and the panel says they “should be viewed as guidelines and not as standards of care”
- Packer RMA, Seath IJ, O’Neill DG, De Decker S, Volk HA. DachsLife 2015: an investigation of lifestyle associations with the risk of intervertebral disc disease in Dachshunds. Canine Genet Epidemiol 2016;3:8: owner-reported web survey, 2,031 dogs; cross-sectional, so associations only
- Merck Veterinary Manual: Disorders of the Spinal Column and Cord in Dogs (pet owner version; Thomas, DACVIM-Neurology; full review Feb 2018)
Always confirm with your vet before acting on anything on this page.