Cornish Rex lean body type: wet vs dry food fix

A lean Cornish Rex on dry food is a pretty common concern — and honestly, your instinct is right to question it. Dry food is calorie-dense by weight, but Cornish Rex cats have unusually fast metabolisms and almost no body fat to buffer against gaps in nutrition. The bigger issue is that dry food alone often leaves them under-hydrated and less satisfied between meals. Wet food is generally better for cats — it's closer to their natural diet, more satiating, and provides the moisture their kidneys and digestion need — but cost and convenience are real factors, and a mixed approach often works well. Before I point you in a specific direction: is your Rex currently on dry food only, and have you had a vet rule out any underlying reason for the lean build — like hyperthyroidism or a digestive issue?

That helps a lot. A healthy, active Cornish Rex with a fast metabolism and free-fed kibble is almost a perfect recipe for staying too thin — not because kibble lacks calories, but because cats regulate intake poorly on dry food, and the low moisture content means less satiety per gram of actual food. What wet food, if any, has he had before? And does he tend to be picky, or does he eat pretty much anything you put in front of him?

Perfect — that gives me exactly what I need. For a lean, active Cornish Rex who prefers meaty textures and needs genuine calorie density alongside proper hydration, I'd recommend Animonda Carny Adult in the chunky meat varieties. It's a German brand, widely respected, made with real named meat pieces in a natural jelly — no pâté, which suits him — and it has a solid protein and fat profile that'll actually support his metabolism rather than just filling him up with carbs the way kibble does. The chunks are substantial enough that he'll engage with it properly rather than gulping and walking off. I'd suggest replacing his free-fed kibble with two scheduled wet meals a day using Carny, and if you want to keep some dry food in the mix for convenience, offer a small measured amount separately rather than leaving it out all day. That structure alone tends to make a visible difference in lean cats within a few weeks. You can find Animonda Carny Adult in multipacks on Amazon UK — worth getting a variety pack first to see which meat flavours he goes for.

Yes — a few things to watch. Within the first two weeks you should see better litter box output and possibly more settled behaviour between meals, which tells you the satiety is improving. In terms of actual body condition, give it four to six weeks before expecting visible change — muscle fill around the shoulders and hindquarters is usually the first thing you'll notice on a lean Rex before any obvious weight gain registers. If after six weeks on two proper wet meals daily he's still not filling out at all, it's worth a vet follow-up just to recheck thyroid levels, since Cornish Rex can be prone to that. But my honest expectation is that switching off free-fed kibble to scheduled Carny meals will sort this fairly quickly. He sounds like a healthy cat who just needs more of the right fuel.

Good plan. Start with two meals a day — roughly 80–100g per meal for an active adult Rex — and adjust up slightly if he's clearing the bowl and still looking for more after the first week. The variety pack will also tell you quickly which proteins he rates, so you're not stuck with twenty tins of something he decides he's bored of. Good luck with him — Cornish Rex are brilliant cats, and he should thrive on this.