A cat can shiver during a stressful event, but trembling also occurs with pain, illness, toxin exposure, or neurological problems. One brief episode does not reveal the cause. What matters is whether the cat is alert, able to walk normally, and behaving as usual between episodes.
When shaking needs emergency attention
Go to an emergency clinic for repeated seizures, collapse, loss of consciousness, severe weakness, breathing trouble, or suspected poisoning. A cat who cannot stand or has a sudden neurological change also needs immediate evaluation. Avoid waiting for an online consultation during an active emergency.
What to do during an episode
Keep the area safe by moving hazards away if possible. Do not put fingers or objects into the cat’s mouth, restrain violent movements, or give human medicines. If safe and without delaying care, record when it began and how long it lasted; a short video may help a veterinarian distinguish tremor from seizure or other movement.
Look at the rest of the picture
Does shaking happen after a loud noise, while sleeping, or unexpectedly during the day? Is there vomiting, drooling, an unusual gait, poor appetite, or a new medication? Note possible access to flea products, lilies or other plants, human drugs, cleaning products, and chemicals. Be ready to tell the clinic your cat’s age and recent health changes.
What the veterinarian may check
Evaluation depends on the observed movements and examination. Temperature, hydration, neurological function, and other tests may be needed. Treating a presumed anxiety problem without examining a sick cat can delay necessary care.
Until assessed, keep the cat in a quiet, safe room and avoid unnecessary handling. For a related warning sign, read our cat lethargy guide. This page offers general information only.
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.