Cat food for sensitive stomachs

So venison actually made things worse — that's useful information, and it does happen. Some cats react to game proteins just as readily as they do to chicken or beef, so the 'novel' label doesn't guarantee a good fit. Digestive sensitivity in cats is usually food intolerance rather than true allergy, and the goal with limited-ingredient or novel-protein diets is simply finding a protein your cat's gut hasn't learned to overreact to. Before I point you toward something specific, it helps to know a little more: how long has your Siamese been having diarrhea, is it every day or intermittent, and what was she eating before you tried the venison formula?

That pattern makes sense — chicken is one of the most common triggers, and venison sometimes cross-reacts or simply doesn't suit every cat's gut. Six months of daily loose stools in a nine-year-old Siamese is worth taking seriously, partly because Siamese are already prone to sensitive digestion, and partly because chronic loose stools at her age can affect nutrient absorption. Has your vet ruled out anything like hyperthyroidism or IBD? Those can mimic food intolerance closely, and at nine it's worth a quick check if you haven't done one recently.

Good — that gives you a clean run at a proper dietary trial. The proteins she hasn't had are the ones to focus on. Given she's had chicken and venison, I'd move to a single novel protein she's genuinely unlikely to have encountered before. Duck is a reasonable option, but turkey paired with a clean recipe is often even better tolerated and easier to find in a limited-ingredient format. For a nine-year-old Siamese I'd specifically recommend Lily's Kitchen Fabulous Fish for Cats — it's a wet food with a short, clean ingredient list, no chicken, no red meat, primarily white fish and salmon with no added grains or fillers. Wet food is also better than dry for gut-sensitive cats because higher moisture content supports digestion and reduces the concentrated starch load. Transition slowly over ten to fourteen days, keep everything else constant, and you should start seeing a meaningful change in stool consistency within three to four weeks if fish suits her.

Texture matters less than ingredients for most cats with food sensitivity, but pâté or smooth formats are sometimes easier on a reactive gut because they're more homogeneous and there's less variation in what the cat is actually eating meal to meal. Lily's Kitchen Fabulous Fish comes in a smooth pâté style, which fits well here. The main thing to watch is that you're not mixing it with anything else during the trial — no treats, no toppers, nothing with chicken or unknown proteins — because that's what keeps the elimination clean and gives you a reliable read on whether the fish formula is working.

If fish doesn't resolve it after a proper four-week trial, the next move would be a hydrolysed protein diet — that's where the protein is broken down into fragments small enough that the immune system typically doesn't react to them. Your vet can prescribe one, or there are over-the-counter options like Royal Canin Anallergenic. But honestly, fish is a strong candidate for a nine-year-old Siamese who hasn't had it before, so give Lily's Kitchen Fabulous Fish a real run first. Keep notes on stool consistency day by day — it makes it much easier to see whether you're trending in the right direction.