Cat food for sensitive stomachs

Digestive upsets during the kitten-to-adult food switch are really common — at six months, the gut is still maturing, and a sudden change in protein or fibre levels can tip things over the edge. Digestive sensitivity like this is usually food intolerance rather than a true allergy, and a limited-ingredient or easily digestible formula tends to sort it out more reliably than anything else. To point you to the right option: is your cat vomiting, passing loose stools, or something else — and what adult food did you switch them to?

That pattern makes a lot of sense. Two things happened at once: the protein and fat profile changed significantly moving from kitten to adult food, and dry food has a much lower moisture content than mousse, which can irritate a digestive system that isn't used to it. Did you transition gradually over about a week, or was it a fairly quick switch?

That's almost certainly the root of it. Even a healthy cat can struggle with a fast switch; at seven months with a still-developing gut, it's even more likely to cause trouble. The good news is this is very fixable. I'd recommend Royal Canin Digestive Care Adult dry food. It's formulated with highly digestible proteins and a specific fibre blend that firms up stools and reduces vomiting episodes — it's not a prescription diet, but it's genuinely therapeutic in how it works. For a 3.5kg cat her age, it'll also suit her size well. Reintroduce it slowly over ten days, mixing increasing amounts into whatever she's eating now, and you should see improvement within the first week.

Go straight to the Digestive Care — no need to step back to kitten food. At seven months she doesn't need the higher calorie density of kitten food, and introducing yet another change would just reset the clock on her gut settling. Start with 80% current food and 20% Digestive Care, and shift the ratio by about 10% every two days. If she has a bad day during the transition, hold the ratio steady for an extra day rather than going back. She should be fully settled on the new food within a fortnight.

Good plan. The 2kg bag is a sensible starting size so you can confirm she takes to it before committing to a larger bag. Once she's been on it for three to four weeks and everything has settled, you can decide whether to stay on it long-term or try a different adult formula with a slower transition. Most cats with transition-related upsets do fine on a standard food once they've had time to adjust — the Digestive Care gives her gut that recovery window.