Why a 3 kg cat reacts to just a taste
Small cats process irritants more intensely. Horseradish contains volatile compounds that inflame the mouth and gut lining — at 3 kg, your cat's system is working harder to clear the irritation than a larger cat's would. The gas you're noticing is likely from swallowed air during lip-licking or mild stomach cramping as the spice moves through.
Watch for excessive drooling or repeated swallowing, which suggests mouth discomfort lasting beyond the initial taste. Fresh water helps dilute the irritants, but don't be surprised if she ignores food for a few hours. Sensitive stomachs often need a brief break after spicy exposures.
The next six hours with a pungent irritant
Horseradish rarely causes lasting harm, but the next half-day matters for comfort. Expect possible loose stool as her gut speeds up to expel the irritant. If she seeks cool surfaces to lie on or paws at her mouth, offer ice chips to soothe without forcing water.
True emergencies would involve vomiting more than twice, trembling, or hiding for over six hours — those suggest deeper distress. But passing gas and temporary appetite loss are standard reactions for petite cats dealing with strong flavors.
When small size changes the risk
At 3 kg, your cat's body can't distribute the irritant as efficiently as a 7 kg cat could. What seems like 'just a bit' to us concentrates more in her smaller digestive tract. This doesn't mean poisoning, but it explains why she's noticeably uncomfortable from an amount a bigger cat might shrug off.
Compare it to eating a whole chili pepper: a child reacts more strongly than an adult to the same bite. Her weight makes reactions appear dramatic even when the substance itself isn't life-threatening.
Sensitive stomachs need gentler monitoring
Cats with delicate digestion often overreact to new irritants. If yours typically gets gassy from diet changes or hides after tasting new foods, this episode may last slightly longer — perhaps 8-10 hours instead of 4-6. Note whether her belly seems tender when lifted.
Recovery should follow a clear path: less gas, then tentative drinking, then interest in food. Backtracking (e.g., drinking then refusing again) warrants a vet check to rule out secondary issues like dehydration from prolonged discomfort.
The full verdict, portion guidance and serving notes are collected on the Hummus food facts page.