TL;DR: Sudden back pain and an inability to walk in dogs is a high-priority medical emergency often caused by IVDD; immediate movement restriction and veterinary care are required to prevent permanent paralysis.
What causes sudden back pain and mobility loss in my dog?
Acute back pain combined with a refusal to walk often indicates a sudden, severe neurological or musculoskeletal event. Common causes and symptoms include:
- Intervertebral Disc Disease (IVDD), where a spinal disc herniates and presses against the spinal cord
- Spinal trauma or fibrocartilaginous embolism (FCE)
- Severe muscle spasms
- Visible signs such as a hunched posture, shaking, crying out, or dragging the hind limbs
Is my dog's inability to walk a medical emergency?
Urgency Level: High. Yes, this is considered a medical emergency because the window for effective treatment—especially surgery—can be very short. To protect your pet, follow these steps:
- Limit your dog's movement immediately to prevent further spinal cord damage.
- Contact an emergency veterinarian right away.
- Recognize that loss of mobility indicates significant spinal cord compression.
- Seek help immediately, as untreated compression can lead to permanent paralysis.
How does a photo or video help the veterinarian triage my dog's back pain?
Capturing a quick video of your dog's attempts to move or their standing posture provides critical diagnostic data for the triage team. A video allows a veterinarian to identify:
- 'Knuckling' (the dog flipping their paws over)
- 'Ataxia' (uncoordinated or drunken-like walking)
- 'Paresis' (significant weakness in the limbs)
- Visual evidence of neurological deficits to help the clinic prioritize your pet's case
Clinical Context (Merck Veterinary Manual)
In dogs presenting with acute back pain and reluctance to walk, emergency triage should assess for neurologic deficits, ranging from pelvic limb ataxia to paraplegia and incontinence. Evaluate deep pain perception caudal to the lesion by pinching the toe or tail, observing for a behavioral response. Spinal radiographs may show narrowing of the affected disc space or radiodense calcified disc material, but advanced imaging such as myelography, MRI, or CT is required for definitive diagnosis of disc extrusion. For animals with severe neurologic deficits, prompt surgery offers the best chance of recovery.
Chapter: Cardiology, Neurology
Source: The Merck Veterinary Manual, 11th Edition (Page 1245)