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Why is my 13-year-old cat having seizures with normal blood work?

Updated On September 23rd, 2025

Pet's info: Cat | American Shorthair | Female | spayed | 13 years and 9 months old | 15 lbs

My cat had had 4 or 5 small seizures in the last 2 weeks. Her blood work is fine. She is 13 years old and is an indoor/outdoor cat. Suggestions on causes?

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1 Answer

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Answered By Mariya Gugel, DVM

Veterinarian

Published on November 18th, 2017

Thank you for using Petco Pet Education Center, formerly Petcoach! I'm sorry to hear that Clunker has been having seizures. It is important to see exactly what is going on, to determine that he is having a true seizure, as opposed to a collapse or localized tremors for a different reason. A video would be very helpful and I would be happy to provide a consultation. If this is a true seizure, they are usually the result of abnormal brain activity. This can be due to a large number of diseases including brain cancer, infection, or epilepsy (the cause of which is not currently known in cats). With brain cancer or epilepsy, blood work can be normal, however, x-rays or a CT scan would determine if there is something else causing the seizures. It may be helpful to know that seizures themselves are not thought to be painful, and it is normal for animals to urinate/defecate while they are having a seizure. This frequency of seizures is definitely confusing and distressful for Clunker, and a veterinarian can prescribe an anti-seizure medication to keep him comfortable. It is important to have Clunker evaluated by a vet to ensure that there is nothing else that can be causing collapse or tremors, such as a hormonal issue or viral infection, and to have him treated appropriately.

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