Seeing a cat shake can be unsettling. A cat may shiver after getting wet or while frightened, but persistent tremors can also accompany pain, illness, exposure to a toxin or a neurologic problem. The most important detail is what your cat is doing during the movement: responsive and able to walk, or disoriented and unable to control the body?
Describe what you actually see
Shivering usually involves small repetitive movements while the cat remains aware. Tremors may affect the head or body and continue despite a comfortable environment. Seizures may involve sudden stiffening, paddling, loss of awareness, abnormal vocalizing or drooling, followed by confusion. Some seizures are subtle; you cannot reliably classify every episode at home. Record a short video if safe, and note how long it lasts.
Possible explanations
Cold, fear and acute stress can cause visible shivering. Pain, fever, weakness, low blood sugar in vulnerable animals, certain medications and exposure to toxic substances may cause shaking as well. If a cat has recently encountered pesticides, flea products intended for dogs, unusual plants or human medications, tell the veterinarian immediately. Do not try to induce vomiting or administer an improvised antidote.
Warning signs that require urgent care
Seek emergency veterinary care for a seizure lasting several minutes, repeated seizures without normal recovery, collapse, difficulty breathing, suspected poisoning or a cat that cannot stand normally. Persistent tremors with marked weakness, abnormal temperature or major behavior changes warrant prompt assessment. Do not wait for an online appointment if the animal is actively seizing or unstable.
What to do during an episode
Move nearby hard objects away to prevent injury, dim bright lights if possible and keep other pets at a distance. Do not restrain the cat tightly, place fingers in the mouth or force food or water. Start timing the episode. If your veterinarian recommends a hospital visit, keep transport quiet and secure and bring the video, product labels and medication list.
Can a remote veterinarian help?
Video can help review a completed episode and decide how urgently to obtain a physical examination, but it cannot replace vital-sign assessment, blood testing or a neurologic exam. If the shaking has stopped and your cat is fully normal, ask about appropriate next steps and what recurrence should prompt emergency care.
Also see our guide to documenting cat tremors.
Reference
American Veterinary Medical Association: telehealth and clinical limitations.
General safety information only; a veterinarian must evaluate the individual patient.
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.