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My cat is aggressive after waking up. Vet found nothing. Help!

Updated On September 23rd, 2025

Pet's info: Cat | American Shorthair | Male | neutered | 1 year and 10 months old | 9 lbs

My cat will wake up from sleeping yowling and growling. Sometimes he get mean with the other animals and even us. We have had him checked out and the vet said there didn't seem to be anything wrong with him. We don't know what to do. Any suggestions?

1 Answer

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on April 11th, 2017

Poor Fiyero! This sounds like it could be a neurologic problem of some kind, or possibly a pain-related disorder such as feline hyperesthesia syndrome. If your veterinarian is stumped, I would recommend getting a second opinion from another local vet, or requesting referral to a specialist for further work-up. Depending on what the underlying problem is, he may benefit from pain medication, steroids, or an anti-seizure medication such as phenobarbital.

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