This is a specific conversation about Senior cat food — what they need as they age — ask about yours and get one honest answer for your exact situation.
inparticular.ai
Two senior cats in the same house with different nutritional needs — that's a genuinely tricky situation, and it comes up more than you'd think. Senior cats generally need higher protein than people assume, reduced phosphorus to protect kidney function, and wet food helps a lot with hydration. But a 10-year-old and a 16-year-old are in very different life stages, and what's right for one may not suit the other at all. How old are both cats exactly, do either of them have any diagnosed health conditions, and what are you currently feeding them?
So my Bombay is 10 and seems healthy, just had a checkup. The older one is 16, a domestic shorthair, and she has early-stage kidney disease — CKD stage 2. Right now they're both just getting the same supermarket senior food which I know probably isn't ideal.
inparticular.ai
You're right that the same food isn't ideal here, and the CKD diagnosis is the key factor that changes everything. For your 16-year-old, reduced phosphorus is genuinely important — it slows the progression of kidney disease — and she needs a renal-supportive wet food as her main diet. Your 10-year-old Bombay with a clean bill of health just needs a good quality senior wet food with solid protein levels. The real challenge is stopping them eating each other's food. Can you tell me a bit more about how you feed them — do they eat in the same room, same time, or do you have any separation set up already?
They tend to eat in the same kitchen, same time. The older one is slower so the Bombay sometimes finishes his and then goes for hers. I've been putting her bowl up on a higher surface but he can still jump up.
inparticular.ai
That's a very common problem and honestly the food separation is just as important as the food choice here, because your 16-year-old eating high-phosphorus food regularly will undo the benefit of any renal diet. The most practical solution is a microchip-activated feeder for your older cat — it only opens for her chip, so your Bombay physically cannot get into it regardless of where it's placed. Once that's sorted, here's what I'd recommend for each cat. For your 16-year-old with CKD: Royal Canin Renal wet food pouches. It's specifically formulated with restricted phosphorus, enhanced omega-3s to support kidney function, and high palatability which matters because CKD cats often lose their appetite. For your 10-year-old Bombay: Hill's Science Plan Adult 7+ wet food — it's a well-balanced senior formula with good protein levels, appropriate for a healthy cat his age without being overly restrictive. The SureFlap SureFeed Microchip Pet Feeder is the feeder I'd pair with this setup for your older girl.
That makes a lot of sense. Is Royal Canin Renal enough on its own or does she need supplements too?
inparticular.ai
For CKD stage 2, Royal Canin Renal wet food as her primary diet is a solid foundation and most cats at that stage don't need additional supplements on top of it — the formula already includes omega-3 fatty acids, controlled phosphorus, and adjusted protein. That said, your vet may recommend a phosphate binder if her phosphorus levels are borderline even on the renal diet, and some vets suggest a potassium supplement if blood levels drop. I'd feed her exclusively on the renal food and then retest her bloods in three months as your vet advises — that'll tell you whether the diet alone is doing the job or whether you need to add anything. Don't supplement without those results guiding you.
Really helpful, thank you. I'll get the microchip feeder sorted and switch them both over gradually.
inparticular.ai
That sounds like exactly the right plan. Switch them over gradually over about a week — mix the new food in increasing proportions with the old — to avoid any digestive upset, especially with your older girl. The microchip feeder will take a few days for her to get comfortable with but most cats adapt quickly. Good luck with both of them — you're clearly on top of it.
