IVDD in Dogs

What IVDD actually is

Your dog's spine is a row of small bones with a cushion between each pair. Those cushions are the discs. Each one has a firm outer ring and a soft gel centre, and their job is to let the spine bend and absorb shock while protecting the spinal cord that runs just above them.

In IVDD, a disc fails and its material moves up into the space the spinal cord occupies. Sometimes the gel centre bursts through the ring in one sudden event; sometimes the ring bulges slowly over months. Either way, the cord gets squeezed. That pressure is what produces the pain, the wobbly legs, and, when it is bad enough, the paralysis. Where it happens along the spine decides which legs are affected: a disc in the middle of the back hits the hind legs, one in the neck can affect all four.

The jelly-doughnut picture explains why the timing varies so much. When the gel is still soft and it tears through the ring, the escape is fast and forceful: that is the sudden-onset case, where a dog is fine in the morning and cannot use its back legs by lunch. When the gel has dried out and the ring simply thickens and bulges, the squeeze builds gradually, and the signs creep in over weeks. Both are IVDD. They just move at different speeds and need slightly different plans.

The five grades of IVDD

Vets sort IVDD into five grades based on what the dog can still do. The grade drives the plan and sets realistic expectations for recovery. Most dogs that reach us for rehabilitation are grade I to III, or a grade IV to V dog recovering after surgery.

Grades can shift. A grade II dog allowed to jump on the sofa can slip to a grade IV within hours, which is the whole reason strict rest is not optional. Read the table as a snapshot, not a fixed label, and re-check your dog against it if anything changes.

Why Dachshunds and Frenchies get it so often

Short-legged breeds are not just built differently on the outside. The gene that gives them their long backs and stubby legs (an FGF4 retrogene, the marker vets call CDDY) also causes their spinal discs to dry out and harden early, often by a year old. A dried, brittle disc is far more likely to crack and burst. This is Hansen Type I disease, the sudden, forceful kind, and it is why a two-year-old Dachshund can go down overnight with no warning.

Singapore is full of exactly these dogs. Dachshunds and French Bulldogs are two of the most popular breeds in local flats, and both sit near the top of every IVDD risk list. Roughly one in seven Dachshunds is affected in their lifetime. Beagles, Shih Tzus, Pekingese, Corgis, Cocker Spaniels, and Lhasa Apsos round out the group.

Larger, longer-legged dogs get a different version. Their discs degenerate slowly with age and bulge rather than burst (Hansen Type II), so the signs come on gradually and look more like the stiffness of spondylosis or lumbosacral disease. Same underlying problem, slower fuse.

Signs to watch for

IVDD signs depend on where the disc sits and how hard it is pressing. A neck disc looks different from a mid-back disc, and a grade I dog looks nothing like a grade IV one. These are the patterns owners notice most.

• A hunched, roached, or tense back, or a lowered head and stiff neck the dog does not want to move
• Yelping or a sharp cry when picked up, touched along the spine, or turning suddenly
• Reluctance to jump, climb stairs, or do the things they did easily last week
• Wobbly, crossing, or swaying back legs, or a drunk-looking, uncoordinated walk
• Knuckling: the paw folds under and the dog walks or stands on the top of the foot
• Dragging one or both back legs, or scuffing the nails on the floor
• Trembling, panting, or hiding, all signs of pain a dog cannot tell you about directly
• Loss of bladder or bowel control, or a suddenly floppy tail, in more severe cases

Sudden, severe signs are an emergency, not a wait-and-see. If your dog goes from normal to weak or paralysed in the back legs over hours, get to a vet the same day. Every hour of cord compression counts, and the earlier the pressure is relieved, the better the recovery.

How AURA helps

Whether your dog was managed with crate rest or came through surgery, the goal of rehabilitation is the same: settle the pain, protect the healing cord, then retrain the legs and core to carry the body again. For paralysed dogs, early, gentle work also keeps muscle from wasting away while the nerves recover. We build the programme around the grade and the vet's plan, and we move at the pace your dog's nervous system sets.

What recovery actually looks like

Recovery from IVDD is not one big leap; it is a sequence of phases, each with a job to do. Rushing from one to the next is how dogs relapse. The timeline below is the shape most cases follow, whether the dog had surgery or was managed on crate rest. The exact pace depends on the grade and how the nervous system responds.

Surviving crate rest in an HDB flat or condo

Strict rest is the part owners underestimate, and most relapses trace back to a dog let out too soon or a home that was not set up for it. A few weeks of genuine confinement gives the disc time to scar. Here is how to make it work in a Singapore flat, where slippery floors and open-plan living work against you.

• Pick a crate just big enough to stand, turn, and lie flat in. Too much room invites the movement you are trying to prevent.
• Set it in a cool spot out of the direct aircon draught and away from the main walkway, so the dog settles instead of guarding the door.
• Lay a yoga mat or rubber-backed runner from the crate to the toilet spot. Tile and marble are the enemy; one skid can undo weeks of healing.
• Carry small dogs up and down. Support the whole spine with chest and hips level, and never lift under the front legs alone.
• Toilet on a short lead, then straight back in. No sniffing wanders, no stairs, no sofa, no matter how well the dog seems.
• Use a sling or a rolled towel under the belly to help a wobbly dog balance while it wees, so the back does not take the load.

Boredom is the real challenge once the pain settles and the dog feels fine but still cannot move around. Feed meals from a snuffle mat or a frozen Kong inside the crate to keep the mind busy while the body stays still.

Protecting the spine for life

Once your dog is through recovery, the aim shifts to keeping the other discs healthy and lowering the odds of a second episode. You cannot change the genetics, but three everyday things make a real difference.

Outlook

Most dogs with IVDD do well, and the grade at the start is the best guide to what to expect. Dogs with pain only or mild wobbliness (Grade I to II) usually recover with rest and rehab, though the disc stays a weak point and some dogs have another flare later. Grade III and IV dogs often walk again, especially when treatment starts quickly and the rehab is consistent, but recovery is measured in weeks to months, not days.

The hard line is deep pain sensation. A paralysed dog who still feels a firm toe pinch has a strong chance, often around 80% or better, of walking again with surgery. Once deep pain is gone, the odds fall to roughly half even with fast surgery, and every hour counts, which is why a dog losing deep pain is a genuine emergency. If the disc is in the neck rather than the back, front legs can be involved too, and the same rules apply.

A frank word on relapse and the worst cases. Chondrodystrophic breeds can herniate another disc down the line, so signs that come back deserve a same-day check rather than a wait. Some dogs who do not fully recover still live happy, comfortable lives, and a small number do best with a set of wheels: a well-fitted cart lets a dog run, play, and toilet normally. Rehab's job is to get every dog as mobile and independent as their injury allows. For other sudden cord problems that mimic IVDD, such as an FCE stroke, see our page on other neurological conditions.

When to call your vet

IVDD can worsen fast. Get to a vet the same day if you see any of these:

• Back legs go from wobbly to not moving at all: the cord compression is worsening and time now matters
• Your dog stops reacting to a firm toe pinch on the back paws: possible loss of deep pain, a surgical emergency
• A belly that feels full and firm, or no urination for 12 hours: the bladder is not emptying and needs help
• Sudden severe pain, constant crying, or collapse: a large or fast disc extrusion
• Weakness spreading to the front legs, or a disoriented, drunk-looking gait: the problem may be in the neck or higher
• Any paralysis after a jump or fall in a Dachshund or French Bulldog: treat it as IVDD until a vet proves otherwise

Common questions

Sources

• Moore SA, Tipold A, Olby NJ, Stein V, Granger N; CANSORT SCI. Current Approaches to the Management of Acute Thoracolumbar Disc Extrusion in Dogs. Front Vet Sci. 2020;7:610. PubMed
• Olby NJ, Moore SA, Brisson B, et al. ACVIM consensus statement on diagnosis and management of acute canine thoracolumbar intervertebral disc extrusion. J Vet Intern Med. 2022;36(5):1570-1596. Wiley
• Sedlacek et al. Nonsurgical Rehabilitation in Dachshunds With T3-L3 Myelopathy: Prognosis and Rates of Recurrence. Front Vet Sci. 2022;9:934789. PubMed
• Levine D, Millis DL (eds). Canine Rehabilitation and Physical Therapy. 2nd ed. St. Louis: Saunders/Elsevier; 2014.
• PDSA. Intervertebral disc disease (IVDD / slipped disc) in dogs. PDSA Pet Health Hub.