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My cat has FIP, improved after fluid drain. Is this normal with FIP?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed | 7.9 lbs

Our cat had a swollen belly, we got fluids drained, steroid shot, brought her home and she is eating and drinking, passing urine and bowel movements. Is this normal with fip? Or should I get a second opinion, we are getting her put to sleep monday(tomorrow). It is our understanding that fluid in the belly is a sign of terminal illness in one form or another, any help is appreciated.

4 Answers

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on February 12th, 2017

I am so sorry Shada is so sick! Because she had the fluid drained from her belly, she will be feeling better having that pressure off, and that's why she is eating, drinking, and using the litter box normally. Unfortunately, FIP is fatal, and the fluid will build up again eventually leading to the same problems. Due to the fact that FIP is fatal, letting her go with humane euthanasia is the best option, especially if she is experiencing fluid accumulation. You can, if you'd like, put off the appointment for a few days to enjoy some last quality time with her before the fluid builds up again, but it's certainly ok to say goodbye to her tomorrow. Again, I'm so sorry she is so sick!

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Other Answers

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    Answered By David Elbeze, DVM, MRCVS

    Veterinarian

    Published on

    It's true that abdominal fluids is one of the common signs of FIP but it could be other things such as an intestinal problem that causes loss of proteins/albumin, or even a liver disease. these conditions need to be tested for, usually when they are all ruled out then FIP is the most likely cause and euthanasia should indeed be considered.

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    Answered By Jacqueline Nobles, DVM, DACVECC

    Veterinarian, Board-Certified Emergency/Critical Care Specialist

    Published on

    Hi, Abdominal fluid is common with the wet form of FIP. You are correct in stating that abdominal effusion independent of cause is associated with a poor outcome. The other major causes of abdominal effusion in a cat include liver disease and cancer. Some FIP patients do ok with palliative but it is short lived...weeks to months.

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    Answered By Jenny, DVM

    Veterinarian

    Published on January 26th, 2018

    FIP does not have a cure. Getting the fluid drained is an option but it will just come back. IF you are having to do this every week, it is not worth it and likely more stressful to him and it is better to have him put to sleep. Most cats with FIP start to feel bad and don't gain weight and have a decreased appetite. If he still feels fine and has a good appetite then you can leave the fluid alone as it is not hurting him to try to put more time in between each draining.

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