Your IBD Cat is Vomiting Again. Here's Why It Keeps Coming Back — and What Most IBD Plans Miss.

A vet nurse on why "she's just a vomiter" is the most dangerous sentence in cat ownership, the tissue that's actually causing it, and the one piece of the IBD protocol that almost never gets into the cat.

Updated 31 Aug 2026

Read time: 5 mins

Written by Kayla Brooks

RVN Registered Veterinary Nurse, feline medicine

You know the sound.

 

That hollow, rhythmic hack from the hallway at 5am. You're out of bed before you're awake, because you know exactly what you'll find and where.

 

If she vomits on a schedule you could almost predict — a few times a week, once a fortnight, always around the same time — this is for you.

 

If she vomits bile on an empty stomach. If she brings up food an hour after eating it. If the vet has said the word "IBD" and you're still cleaning it up.

 

Keep reading.

"She's Just a Vomiter"

I hear it in the consult room every week. 

 

Cats vomit. It's a hairball thing. She's always done it.

 

Here's what I tell every one of them: a healthy cat should vomit a handful of times a year. Not a handful of times a month. Regular vomiting isn't a personality trait. It's a symptom, and in a cat over five it very often points to one thing — inflammatory disease in the wall of her gut.

 

And I understand why the myth survives. Because the vomiting stops sometimes.

The Weeks It Stops

You've had them.

 

You changed the food, or the vet started her on a tablet, and the hallway went quiet. A week. Two weeks. You stopped flinching at 5am. You thought: I've got it.

 

Then the sound comes back.

 

I've sat across from hundreds of owners in that cycle. Found it, lost it, found it, lost it. It isn't the vomiting that breaks people. It's the hope, handed back and taken away.

Why a Vomiting Cat Is a Clock

Most owners treat vomiting as a mess problem. In an IBD cat, it's an eating problem — and that's far more serious.

 

A cat who vomits after meals learns, fast, that food equals feeling sick. So she eats less. She picks. She walks up to the bowl, sniffs, and walks away. And here's what makes cats different from dogs and from us: when a cat stops eating for more than a couple of days, her body starts breaking down fat faster than her liver can process it. Vets call it hepatic lipidosis. It's one of the most common reasons an IBD cat ends up in hospital on a feeding tube. It doesn't take weeks.

 

So the vomiting isn't the danger. The vomiting is what makes her stop eating. That's the danger.

 

Which means anything you add to her routine has to pass one test first: will she eat it, every day, without it costing her a meal?

 

Hold that. It's the whole article.

What's Actually Making Her Vomit

Her intestine isn't a tube. It's a membrane about one cell thick that digests, absorbs, defends and decides — all at once.

 

In IBD, inflammatory cells move into that wall and don't leave. The lining swells. Movement through the gut slows and becomes irregular. Food sits, ferments, comes back up. Bile pools in an empty stomach and comes up on its own. That's the 5am hack.

 

So the target isn't the vomiting. The target is the inflammation in the wall that's producing it.

What Your Vet's Plan Covers — and the Piece It Usually Skips

If she's been diagnosed, her plan almost certainly looks like this: a steroid (prednisolone or budesonide) to suppress the inflammation, and a hydrolysed or novel-protein diet so her immune system stops reacting to food. Maybe an anti-nausea tablet for the bad days. Maybe B12.

 

That plan is right. Keep doing it.

 

But read the feline GI nutrition literature and one thing turns up in review after review that rarely turns up in the protocol:

 

Marine omega-3s. EPA and DHA.

 

EPA participates directly in the inflammatory pathways inside the gut wall. DHA is a building block of the cell membranes that are that wall. This is not the shiny-coat version of fish oil. This is inflammatory balance in the exact tissue that's making her sick.

 

One veterinary review gives empirical daily intake ranges for cats:

 

EPA: 17–25mg per kg of bodyweight DHA: 8–18mg per kg

 

For a 4kg cat, that's roughly 68–100mg of EPA a day.

 

Is she getting that? Most vomiting cats aren't. And it's not because their owners don't care.

Why It Never Gets Into a Vomiting Cat

1. She won't eat it. You've finally found a food she'll keep down. You pump strong-smelling oil over it. She sniffs and leaves. Remember the clock — you may have just cost her a meal she was still willing to eat.

 

2. Fish oil on a nauseous stomach. A cat who already associates food with feeling sick does not need a slick of rancid-smelling oil to confirm it.

 

3. The bottle changes. EPA and DHA oxidise. Every pump lets in air and light. By week three the oil smells different, and a cat that's already suspicious of her bowl notices before you do.

 

4. You're already at capacity. Did she vomit? What did it look like? Did she get her tablet? Now add measuring millilitres into a cat that's watching you do it.

 

Every point of friction is a day it doesn't get into the cat. For a vomiting cat, that's the only metric that counts.

Where Fureeze Fits

Fureeze Daily Fish & Krill Oil is individually sealed Snap-pack. Not a bottle degrading on the counter — a fresh snap-pack, every day.

 

Open. Squeeze over food. Done.

 

No pump. No measuring. No fridge. Airtight until the moment it's used, with vitamin E protecting the oil inside. And because it's fresh every time, it smells like fish — not like week-three fish.

 

The numbers are printed, not implied:

 

160mg EPA · 118mg DHA · 278mg combined, per serving.

 

Against the published range for a 4kg cat (68–100mg EPA), one snap-pack clears the top with room to spare.

 

Also in each serving:

  • Anchovy fish oil (220mg) — wild-caught, low-mercury EPA and DHA
  • Antarctic krill oil (100mg) — omega-3 carried on phospholipids, a different absorption route to standard fish oil; useful when the gut wall is inflamed and absorbing poorly
  • Hydrolysed chicken — protein broken into fragments too small for the immune system to react to. Same principle as prescription hydrolysed diets. It's there for taste and gut-compatibility, not as a protein source
  • L. plantarum + MOS — a supporting synbiotic. 
  • Taurine (120mg), astaxanthin, vitamin E

Does It Fit With What She's Already On?

Yes. Prednisolone, budesonide, hydrolysed or novel-protein diets, anti-nausea medication, B12, probiotics — Fureeze is built to sit alongside all of them, not replace any. If she's on an elimination diet, the chicken is hydrolysed for exactly that reason. If she has pancreatitis or is on multiple medications, check with your vet first — I'd say the same about a new treat.

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But First, She Has to Eat It

Every ingredient above is worthless if it fails the only test that matters in an IBD household. Fureeze ran an in-house double-blind palatability trial across 200 domestic cats under controlled feeding conditions, against the major online Australian fish-oil brands.

 

91% showed a first-choice preference for Fureeze.

⭐⭐⭐⭐⭐ “Lucy was still eating, but she kept looking thinner. Since adding one snap-pack to her food each day, she has been finishing her meals more regularly—and our daily routine finally feels manageable.”

— Susan C., Verified Buyer | New York

 

⭐⭐⭐⭐⭐ “Milo has IBD, so his litter-box days used to feel completely unpredictable. After several weeks of daily use, his stools seemed more consistent and we noticed fewer unsettled days.”

— Danielle P., Verified Buyer | Denver

 

⭐⭐⭐⭐⭐ “We tried bottled fish oil before, but the smell made Oscar walk away from dinner. He accepts these snap-packs mixed into his wet food, and I love that there is no measuring or guessing.”

— Jessica L., Verified Buyer | London

 

4.7/5 across 2,642 reviews. Used by 60,000+ pet parents.

If She's Living With IBD, This Is the Time

You cannot control the next flare. But you can control what you're feeding the three systems IBD keeps attacking — every day, in between.

 

And here's what you're actually buying. Not a supplement.

 

A hallway that's quiet at 5am.

A bowl she walks up to and eats from — not sniffs and leaves.

A morning where you don't get up already knowing where the towel goes.

Her, on your chest again after dinner — instead of hiding under the bed feeling sick.

 

You've seen that version of her in the good weeks. The difference now is that the piece her plan was missing is in there too — every day, between the bad ones, with no fight at the bowl.

 

One snap-pack a day. 28 servings per box. Individually sealed. Shelf-stable. No fridge. No pump. No measuring.

 

Give her the daily habit that supports all three — not just the one you can see.

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Sarah Lyn is an Australian based writer and lifelong cat owner. This article includes affiliate links; Fureeze provided product for review but did not approve the final copy. Always consult your vet before introducing a new supplement, especially if your cat is on medication, has pancreatitis, or is pregnant.

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