Cat food for sensitive stomachs

Good news that your vet has already ruled out parasites — that's an important step, and a limited-ingredient diet is exactly the right direction to take next. Digestive sensitivity in cats is usually down to food intolerance rather than a true allergy, and Persians in particular can be prone to it. To point you toward the best option: is she mainly vomiting, passing loose stools, or both — and what is she currently eating?

Four months of regular vomiting is definitely worth sorting properly, and chicken is one of the most common culprits in cats who develop intolerances — it's in so many mainstream foods that the gut just gets overexposed to it. Has she eaten anything with fish or duck in the past, or would those be genuinely new proteins for her?

Duck is a great option then — genuinely novel for her, which is exactly what a limited-ingredient approach needs to work. My recommendation would be Canagan Grain Free Duck for Cats. It has a single named protein source, no chicken, no grain, and a short, clean ingredient list. Canagan is well regarded and genuinely good quality — not a budget brand dressed up as premium. The wet version is worth considering too, as the extra moisture is good for Persians generally. Start with a slow transition over about ten days and keep everything else the same so you get a clear picture of whether it's making a difference.

Yes, absolutely — at least for the first six to eight weeks. The whole point of an elimination trial is to isolate one protein, and treats can quietly undermine that. Once the vomiting has settled and she's been stable for a month or so, you can reintroduce a single treat and see how she responds. It's a bit tedious but it gives you real information. If she's still vomiting after six weeks on the Canagan Duck with no other variables, that's worth reporting back to your vet.

Good plan — keeping a simple log really helps, even just jotting down vomiting episodes and any changes. Canagan Duck is available on Amazon UK in both wet and dry. I hope she settles down quickly; Persians can be sensitive souls but they usually respond well once you find the right food.