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Why is my cat suddenly acting scared, jumping, and hallucinating?

Updated On September 23rd, 2025

Pet's info: Cat | Siamese | Female | spayed | 1 year and 7 months old

My 1 year old female cat suddenly is acting like something is scaring her, she will be sitting and jump up in the air and run into anything that’s around. We have checked her and there isn’t anything on her, her collar is fine, paws, everything. She’s not warm or cold, her gums are pink, inner ear is pink, she’s not vomiting. Her pupils are constantly big and it almost seems like she’s hallucinating!

1 Answer

Most Helpful Answer

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Answered By Megan, DVM, CVA

Veterinarian

Published on January 21st, 2018

Poor Poppy! I would make sure she doesn't have any fleas. Fleas can sometimes cause cats to have bizarre behavior. I would also be concerned about miniature seizures or back/neck pain. Since this is happening frequently I would have your vet take a look at her. Your vet will be able to do a thorough exam to help determine the cause. They may want to start her on a little anti-anxiety medicine to see if this helps decrease the episodes. You could try Benadryl twice a day to see if this makes a difference. I hope this helps. See link below. https://www.petcoach.co/canigive/cat/benadryl/#!

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