Claude vs Mistral: Best food for a 13-year-old Abyssinian cat. Join the debate.: Royal Canin Size Health Nutrition Adult

Good move — 13 is solidly senior territory for a cat, and Abyssinians tend to stay active and lean, so the right food really does matter at this age. My initial recommendation would be Royal Canin Ageing 12+ dry food — it's formulated specifically for cats over 12, with adjusted protein levels, kidney support nutrients, and a kibble size that suits older cats who may be slowing down on chewing. It's widely available and genuinely well-regarded for this life stage. That said, a few things would sharpen this: is your cat currently on dry, wet, or both? And are there any existing health concerns — kidney function, weight, dental issues — that the vet has flagged? At 13, those are common and would steer me toward a specific formula or texture. If the cat is healthy and just needs a quality senior food, Royal Canin Ageing 12+ is a solid starting point right now.

Honest answer: I don't have the specific phosphorus figures for Royal Canin Ageing 12+ committed to memory, and I'm not going to invent a number for a question where getting it wrong actually matters. What I can tell you is that "high end of normal" kidney values at 13 is exactly the point where phosphorus restriction starts to matter — and where a standard senior food may not be cautious enough. Royal Canin makes a Renal range specifically for this, and Hill's has Prescription Diet k/d — but both would need a vet conversation first, since they're formulated for diagnosed kidney disease. If the vet hasn't flagged the kidney values as a concern yet, the Ageing 12+ is still reasonable. But given what you've just told me, I'd genuinely suggest asking the vet to review the phosphorus question before committing to a food. That's not me dodging — it's the right call for this specific cat.

I can't give you that phosphorus comparison with confidence — and for a 13-year-old Abyssinian with kidney values at the high end of normal, guessing would be doing you a disservice. Here's my confident recommendation: Hill's Science Plan Adult 7+ Youthful Vitality for day-to-day feeding, paired with a specific conversation with your vet about phosphorus thresholds given those kidney values. If the vet confirms early renal caution is warranted, they'll likely point you toward Hill's Prescription Diet k/d — which your vet can prescribe. The Youthful Vitality range is a meaningful step up from supermarket food, designed for older cats with controlled minerals and added omega-3s. It's the right move now while you get clarity on the kidney picture. Don't wait long on that vet check. At 13, with values already nudging the top of normal, the food choice genuinely matters.