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My cat frequently vomits dark green liquid. Should I be worried?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 5 years and 9 months old | 20 lbs

My cat frequently vomits. He is 6 & weighs 20 lbs. Yesterday he started vomiting clear yellow/green liquid. Today it is thicker & a dark green. He has been seen several times for vomiting, no one ever has any answers & I can't afford to keep taking him to the vet. I have 4 cats so it is nearly impossible to observe eating/ drinking/ bathroom habits. He usually just lays around. I want to know if it is concerning that his vomiting is a much darker green.

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2 Answers

Most Helpful Answer

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Answered By Vanessa Yeager DVM MPH

Veterinarian

Published on September 20th, 2017

Hi and thank you for your post on Petco Pet Education Center, formerly Petcoach! Vomiting a dark green fluid can be a sign of a gall bladder disorder (mucocele or stones) pancreatitis, liver disease or an intestinal obstruction which are all concerning health conditions. He should have blood work done and an ultrasound done to help determine the cause. Best of luck to you and Bubba.

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    Answered By Destini R. Holloway, DVM

    Veterinarian

    Published on

    Poor guy. I am sorry you have been to the vet several times with no explanation as of yet. The green vomit is a bit concerning because this is bile and means his stomach is completely empty. I am not sure what diagnostic tests they have ran on Bubba so far, but I would recommend having him tested for pancreatitis (a simple blood test), abdominal radiographs (to look at his stomach and intestines and possible abdominal ultrasound (if the radiographs don't reveal the issue. You can elect to just do an abdominal ultrasound if you are crunched for funds. In the meantime I would ask your vet if they can prescribe an easily digestible food that is high in fiber, such as the Royal Canin Gastrointestinal high fiber (Rx). Also if his bloodwork is normal then a trial of steroids can be considered to treat for a suspected inflammatory bowel disease, especially if more testing (radiogrphas and ultrasound) are not financially feasible. Here is more information on inflammatory bowel disease in cats, in which chronic vomiting is the #1 symptom. http://www.veterinarypartner.com/Content.plx?P=A

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