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Cat aggressive & has one large pupil after vaccines. Normal?

Updated On September 23rd, 2025

My cat just had rabies and distemper vaccines, today she has bouts of anger, hissing growling. Her left pupil seems larger

1 Answer

Most Helpful Answer

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Answered By Cara, DVM, cVMA

Veterinarian

Published on August 26th, 2017

Sometimes vaccines can result in some discomfort and lethargy, but usually only for 24 hours or so afterwards. If it has been longer than that since she was vaccinated it is unlikely to be due to the vaccines. If one pupil is consistently larger than the other that is abnormal however and I would recommend you take her back to the vet to be checked out.

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