Intervertebral disc disease (IVDD)

Symptoms an owner can spot at home

• Reluctance to jump, climb stairs, or be picked up
• Hunched back or stiff neck
• Yelping when touched along the spine or picked up
• Wobbly, drunken-looking hind legs (ataxia)
• Knuckling over on the paws
• Inability to stand or move the rear legs (paraplegia)
• Loss of bladder or bowel control

When to see a vet

• Any sudden loss of coordination, weakness, or paralysis in the hind legs, same-day emergency, time-sensitive
• Loss of deep pain sensation in the feet, surgical window narrows quickly
• Sudden severe spinal pain, especially in a chondrodystrophic breed
• Inability to urinate (distended, painful bladder)

What it is

Spinal discs sit between vertebrae and cushion movement. In IVDD they degenerate, the soft inner nucleus calcifies and either explosively extrudes through the outer ring into the spinal canal (Hansen type I, common in young chondrodystrophic breeds) or slowly bulges (Hansen type II, more typical in older large-breed dogs). The displaced disc compresses the spinal cord, causing pain, weakness, or full paralysis depending on severity and location.

Type I IVDD is genetically linked to the chondrodystrophy mutation (FGF4 retrogene) that gives Dachshunds, French Bulldogs, Beagles, Corgis, Basset Hounds, and similar breeds their short legs. The breed risk is real and substantial, the Dachshund Breed Council UK and peer-reviewed literature put the Dachshund lifetime risk at roughly 1 in 4.

Neurologic grading

Vets grade IVDD by neurologic function, not by imaging alone. Grade 1 is pain only. Grade 2 is ambulatory paraparesis (walking but weak). Grade 3 is non-ambulatory paraparesis. Grade 4 is paraplegia with intact deep pain. Grade 5 is paraplegia with loss of deep pain. Prognosis with appropriate treatment is excellent for grades 1-3, good for grade 4, and substantially reduced for grade 5, the deep-pain-negative dog is a true emergency and surgical decompression within the first 24-48 hours markedly improves outcome.

Treatment overview

Editorial overview, not a treatment plan. Mild cases (grade 1-2) are typically managed conservatively: strict crate rest for 4-6 weeks, multi-modal pain control, and gradual return to activity. Higher grades, or any case that fails to improve on conservative management, are evaluated for advanced imaging (MRI) and surgical decompression (hemilaminectomy). Post-operative rehabilitation is a meaningful part of recovery.

What owners can do, IVDD is preventable

• Keep at-risk dogs lean (4/9 body condition). Every extra pound directly loads the spine.
• Ban jumping from furniture, beds, and out of cars. Use ramps.
• Use a Y-front harness, not a neck collar, for leash restraint.
• Support chest AND hindquarters when picking up, never lift by the front legs alone.
• Avoid weight-bearing on hind legs as a routine trick.
• Recognize early signs (reluctance to jump, hunched back, yelping when picked up) as same-day veterinary calls.