Vet-recommended cat food for food intolerance

Since your vet has already confirmed a food intolerance and pointed you toward a single-protein diet, you're actually in a good position — you've got a clear diagnosis and a clear direction. Digestive sensitivity in cats is often driven by a reaction to a specific protein they've been exposed to repeatedly, so the goal is to find one novel or clean protein source and stick with it. To point you to the right product, it helps to know: which proteins has your Sphynx already eaten over the years, and what symptoms are you still seeing — vomiting, loose stools, or both?

That makes a lot of sense — chronic exposure to chicken and fish is exactly how sensitivities develop, so both are worth avoiding now. For a novel protein, duck is usually the best starting point: it's genuinely uncommon in mainstream cat food, it's highly digestible, and there are some good single-ingredient dry options available in the UK. Given that she's eight, keeping her on a complete dry food rather than something raw or supplemented is also a sensible call unless your vet said otherwise. Is she currently on dry, wet, or a mix?

Perfect. In that case I'd recommend Lily's Kitchen Adult Dry Cat Food in the Duck and Chicken-free recipe — specifically their 'Fabulous Fish-Free' duck variant isn't always easy to find, so the one to look for is their Duck recipe dry food, which uses duck as the primary and sole named meat protein. It's made with whole ingredients, no artificial additives, and no fillers that tend to aggravate sensitive guts. It's widely available on Amazon UK and comes in a 2kg bag which is a good size to run a proper trial — you'd want around six to eight weeks on it exclusively to see whether the loose stools resolve. Transition slowly over ten days if you can, even though it's dry food.

Yes — the main thing is strict elimination. No treats, no toppers, no table scraps during those six to eight weeks, because even a small amount of chicken or fish can keep the reaction ticking over and muddy the results. Keep a simple log of stool consistency and vomiting frequency so you can give your vet something concrete at the follow-up. If her stools are firming up within two to three weeks, that's a strong positive sign. If there's no improvement at all after four weeks, it's worth going back to the vet to discuss whether there's something else going on beyond diet.

Good plan. Slow transition, strict trial, and a short log — that's genuinely all you need to give it a fair test. Hope her digestion settles down quickly; Sphynx cats can be prone to sensitive stomachs so finding the right food makes a real difference to their day-to-day comfort.