Cat food for two cats, one with a sensitive stomach

Digestive sensitivity in cats is often down to food intolerance rather than a true allergy, and limited-ingredient or novel-protein diets tend to work best — they reduce the number of potential triggers without making mealtimes complicated. Before I suggest anything, can you tell me what symptoms your Abyssinian is showing (vomiting, loose stools, or something else), how long it's been going on, and what you're currently feeding both cats?

Four months of intermittent vomiting and loose stools is a classic pattern for food intolerance — usually a reaction to a common protein like chicken or beef, or to fillers and artificial additives in mainstream wet foods. The fact that Pip is fine on the same food is actually quite common; sensitivities are individual. Finding one food that suits both of them is very achievable — you just need something gentle enough for Nile that's also complete and balanced for a healthy adult cat like Pip. What protein is in the food they're on now, do you know?

Quite possibly, yes — chicken is one of the most common triggers. Switching to a novel protein and a short, clean ingredient list is the sensible first move. My recommendation for both Nile and Pip is Lily's Kitchen Adult Cat Fishy Fish Pie — it's a wet food with fish as the primary protein, no chicken, no artificial additives, and a genuinely short ingredient list. It's designed for adult cats, so it covers Pip nutritionally with no issue, and the limited ingredients make it much gentler for Nile's stomach. It's widely available, comes in pouches so you can ease into it gradually, and the vast majority of cats with sensitive digestion do well on it. I'd switch over about 7–10 days, mixing it in slowly, and give it a solid 6 weeks before judging the result.

During the transition, a little extra loose stool in the first week or so is normal and not a red flag — it's the gut adjusting. What you want to watch for is anything getting significantly worse rather than just unsettled: persistent vomiting every day, blood in the stool, or Nile going off his food entirely. If any of those happen, stop and get a vet check, because at that point you'd want to rule out something like inflammatory bowel disease or a more complex intolerance. If the fish diet doesn't resolve things after six weeks, the next step would be a vet-prescribed hydrolysed protein diet. But for most cats in Nile's situation, a clean fish-based food like Lily's Kitchen makes a clear difference within a few weeks.

Good plan. Give it the full six weeks and keep a rough note of how often Nile vomits week by week — it's easy to forget where you started, and tracking it will tell you clearly whether it's working. Good luck with both of them.