Spondylosis deformans in rabbits is age-related bridging bony growth along the lower spine that produces stiffness, reluctance to hop, urine scald, and difficulty reaching cecotropes. It is common in middle-aged and senior rabbits — radiographs reveal spondylosis in a substantial fraction of rabbits over 5 years old in survey series — and is managed with weight control, NSAIDs, environmental modifications, and physical therapy (Benato et al., 2019, JSAP).
Last reviewed: June 2026
What Spondylosis Is and Why It Matters
Spondylosis deformans is a non-inflammatory degenerative process in which bridging osteophytes form between adjacent vertebrae, particularly in the lumbar and lumbosacral spine. Over months to years the bony bridges stiffen segments of the spine and reduce flexibility. In rabbits this matters because the rabbit's normal hopping gait, ability to reach the perineum to consume cecotropes, and ability to assume a litter-box posture all require spinal flexion. A stiff senior rabbit may not look painful but is mechanically constrained in ways that affect grooming, hydration, and toileting.
Signs Owners Should Watch For
The earliest signs are subtle: a hop that is shorter than it used to be, reluctance to jump onto a familiar perch, slower transitions between sitting and lying, dribbled urine on the perineum (urine scald), uneaten cecotropes stuck to the bottom, and a fluffed or unkempt rear end. Front-half grooming usually remains intact. As disease progresses, the rabbit moves with a shuffling rather than hopping gait, may refuse the litter box, and develops sore hocks (pododermatitis) from increased time sitting and dragging.
Diagnosis
Spondylosis is diagnosed on lateral spinal radiographs by visualization of bridging osteophytes between vertebral bodies. The clinical relevance depends on the rabbit's signs more than on radiographic severity — many radiographically affected rabbits remain comfortable. As described in Quesenberry & Carpenter's Ferrets, Rabbits & Rodents, differential diagnoses for hindquarter weakness in adult rabbits include encephalitozoonosis, intervertebral disc disease, lumbar fracture, lymphoma, and uterine adenocarcinoma in intact does. Urinalysis, E. cuniculi serology, and complete bloodwork separate spondylosis from these other causes.
NSAID Therapy and Pain Management
Meloxicam 0.6 to 1.0 mg/kg orally once to twice daily is the most commonly used NSAID in rabbits and is supported by multiple safety and efficacy studies. Long-term meloxicam at the lower end of the dose range is generally well tolerated. Tramadol has variable efficacy in rabbits and is largely abandoned. Gabapentin at 5 to 10 mg/kg twice daily helps neuropathic pain components. Acupuncture has anecdotal benefit in some rabbits with spondylosis. Routine bloodwork every 6 months is reasonable for any senior rabbit on long-term NSAIDs to monitor kidney function. Pain control in senior rabbits is supported by published rabbit-specific analgesia evidence (Oglesbee & Lord, 2010, JEPM).
Environmental and Lifestyle Modifications
Modifications that produce the biggest comfort gains are practical: a lower-edge litter box the rabbit can step into without jumping, non-slip flooring throughout the enclosure, soft padded surfaces in favored sleeping spots, and a ramp instead of any required jump. Daily perineal hygiene with warm water and a soft cloth prevents urine scald. Brushing twice weekly compensates for reduced self-grooming. Weight loss in overweight rabbits dramatically reduces spinal load — a 10 percent body weight reduction frequently produces visible mobility improvement within weeks. Provide unlimited grass hay and limit pellets to 20 to 30 grams per kilogram per day.
Physical Therapy and Movement
Gentle daily movement is more useful than rest. Slow controlled walks on a non-slip floor for 5 to 10 minutes twice daily, hide-and-seek games that encourage gentle weight shifts, and structured low-step obstacles all preserve range of motion. Some rabbits benefit from veterinary rehabilitation visits with underwater treadmill if available — these are limited to a small number of exotic specialty centers in the US.
When to See a Vet
Call your vet today if:
- A senior rabbit is reluctant to hop or jumps shorter than before
- Cecotropes stuck to the perineum or appearance of urine staining on the rear
- Sore reddened skin on the hocks (early pododermatitis)
- Loss of litter-box training in a previously trained rabbit
- A senior rabbit losing condition without other obvious cause
Go to the ER immediately if:
- Sudden total inability to move the hind end
- A rabbit dragging both back legs with no voluntary movement
- A senior rabbit suddenly unable to stand, with stiffness and pain on touch
- Stopped eating or producing droppings for 12+ hours
- Severe collapse or respiratory distress
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Frequently Asked Questions
Is spondylosis painful in rabbits?
Often yes, but rabbits are stoic prey animals that mask discomfort. Indirect signs of pain include reduced grooming, partial appetite changes, withdrawal, and bruxism (tooth grinding). A trial of meloxicam for 7 to 10 days frequently produces visible improvement in activity and grooming — that improvement is itself diagnostic of pain. Absence of vocalization does not mean absence of pain in rabbits.
How much does spondylosis workup and management cost?
Initial exotic vet exam typically runs $75 to $200 since exotic exams price about 1.5 to 2 times standard. Spinal radiographs add $200 to $450. Bloodwork and E. cuniculi serology cost $150 to $400. Meloxicam suspension runs $25 to $90 for a 30 to 60 day supply depending on rabbit size. Gabapentin compounded is $30 to $80 per month. Environmental modifications — ramps, non-slip mats, low-entry litter box — cost $40 to $200 one-time. Rehabilitation visits at exotic specialty centers run $80 to $200 per session.
Can I use canine arthritis NSAIDs for my rabbit?
Many of the same drugs are used. Meloxicam is the most commonly prescribed NSAID in rabbits and is the same active drug as in canine products, though the rabbit dose is much higher per kilogram. Do not dose from a canine product label without veterinary input — rabbit doses, dosing intervals, and safety profiles are different. Carprofen is occasionally used but has less safety data in rabbits than meloxicam. Never use ibuprofen or naproxen in rabbits.
Will my rabbit eventually become paralyzed?
Most rabbits with spondylosis remain ambulatory throughout life with comfort-care management. Progression to true paralysis is uncommon and usually signals a different process — disc herniation, vertebral fracture, severe E. cuniculi, or a tumor. Acute loss of hind end function in a rabbit with known spondylosis is an emergency rather than a typical progression.
How long can a rabbit live with spondylosis?
Many rabbits diagnosed with mild spondylosis at age 5 or 6 live to their full life expectancy of 8 to 12 years with structured supportive care. Quality of life depends much more on owner attention to weight, hygiene, environmental modification, and consistent NSAID therapy than on the radiographic severity itself.
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