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What causes seizures in my 12-year-old cat only when sleeping?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Female | spayed | 12 years and 3 months old | 8 lbs

Our cat is 12 yrs old and has been having small seizures only when asleep for the past week. She throws her head back and opens/closes her mouth constantly. They only last about 30-45 sec then she seems ok. But she has been having them more and more frequently, 6-8 a day that we know of, depends on how much she tries to nap, but they wear her out so she tries to sleep and ends up having more seizures. Has had 2 bad ones where she has gotten sick and been disoriented after. Upset and unsure?!?!?!

1 Answer

Most Helpful Answer

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Answered By Sara Farmer, DVM

Veterinarian

Published on July 20th, 2017

It is a little unusual for seizures to happen during a sleep cycle, but if she seems disoriented after waking up this is probably what is happening. In a cat Cassie's age I would worry that the seizures are due to a primary brain disease and not something more benign like epilepsy. Kidney disease, liver disease, or hypoglycemia can also cause seizures but it would be less likely for Cassie to act like her normal self in between seizure episodes. Infections, some inflammatory diseases or cancer would be most common. Regardless of the cause of the seizures anti-epileptic drugs can sometimes help control the frequency and severity of the seizures, but if the underlying disease is not treated at some point the seizures will progress. I would recommend seeing your veterinarian to discuss testing and treatment options.

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