TL;DR: Tetraparesis is a high-priority veterinary emergency involving weakness in all four limbs that requires immediate medical attention. If your cat cannot stand, walk, or is dragging their legs, seek care at a 24-hour facility immediately as this condition can interfere with their ability to breathe.
What is tetraparesis and how does it affect my cat?
Tetraparesis is the medical term for a significant weakness in all four of a cat's limbs. Unlike paralysis, where movement is completely lost, tetraparesis means your cat can still move their legs but lacks the strength or coordination to stand or walk normally. It is often a sign that something is interrupting the communication between the brain and the body, commonly involving the spinal cord or the peripheral nervous system.
Is my cat having a medical emergency if they can't move their legs?
- Sudden or progressive weakness in all four limbs is considered a high-priority veterinary emergency.
- Because this condition can involve the cervical spine (neck) or brain, it may also affect the muscles responsible for breathing.
- If your cat is unable to support their weight or is dragging their limbs, you should seek immediate veterinary care at an emergency 24-hour facility.
How can taking a photo or video help the veterinarian triage my cat's weakness?
- Before transport, capture a brief 10-second video of your cat's movement or a photo of their resting posture.
- Since cats often mask their symptoms or become rigid with stress at the clinic, home footage helps the triage team see their natural behavior.
- Visual evidence allows the veterinarian to differentiate between neurological weakness, pain, or orthopedic injury much faster.
Clinical Context (Merck Veterinary Manual)
Spinal cord involvement in feline infectious peritonitis can cause tetraparesis, often accompanied by spinal hyperesthesia. Diagnosis is challenging due to insensitive and nonspecific serum antibody tests; however, CSF analysis typically reveals a mixed pleocytosis with increased protein concentration. Feline leukemia virus-associated myelopathy can also manifest as progressive pelvic limb weakness leading to paraplegia, sometimes with diffuse spinal pain and behavioral changes. Flaccid tetraparesis or tetraplegia can rapidly develop, sometimes with facial and laryngeal weakness, with spinal cord reflexes being weak to absent, and severe muscle atrophy evident within 10-14 days.
Chapter: Neurology
Source: The Merck Veterinary Manual, 11th Edition (Page 1251)