Kidney disease in cats: most cats accepted the renal diet in a home trial

If your cat is ever told to eat a kidney diet, you can relax a little less about the bowl and a little more about the cuddles. In a home trial, most cats accepted a renal diet with no apparent palatability concerns. That is good news for kidney disease in cats, because a diet only helps if your cat actually eats it.

Owners rated the diet a success for about 7 in 10 cats. And if their vet prescribed it, nearly 8 in 10 owners said they would offer it to their cat.

How the study worked

Forty-two cats living with 31 caregivers took part at home, in three 6-day phases: first only the renal diet, then only their usual wet food, then both side by side. Caregivers wrote down how fast each cat started eating, how much it ate and how it behaved around food. The results were published in September 2026 in the Journal of Veterinary Internal Medicine. The cats were healthy and the trial was short, and it tested one commercial wet diet made for early-stage kidney disease.

What they found

Caregivers judged how well each cat took to the renal diet. Here is how it came out:

• Positive: 69.0% of cats, about 7 in 10.
• Neutral: 7.1% of cats.
• Negative: 23.8% of cats, about 1 in 4.

The cats also started eating the renal diet about as quickly as their usual food. Speed was not meaningfully different.

When the cats had only one food in front of them, they tended to eat more of their usual food than the renal one. That is no surprise for a creature who loves its routine.

The side-by-side phase is the most telling. With both bowls out, neither food won. Caregivers thought 47.6% of cats preferred their usual food and 45.2% preferred the renal diet. That is nearly a tie.

Finally, the owners themselves were convinced. If a vet prescribed it, caregivers said they would offer this diet to 78.6% of their cats.

Why a kidney diet matters

Chronic kidney disease is common in older cats. A special renal diet, with less phosphorus among other changes, is one of the most effective ways to manage it. Wet versions are considered the best option.

Cats have a reputation for being picky, so many owners worry the food will end up untouched. This trial shows that worry is often bigger than the problem. Starting a helpful diet sooner is easier when you know most cats will give it a try.

What you can do today

You do not need a diagnosis to be ready. Keep this simple plan in your back pocket for the day your vet recommends a renal diet. Switch over several days, not all at once. Start by mixing a small spoonful of the new food into your cat’s usual wet food, offer it warm, and add a little more each day. If your cat turns it down, ask your vet about another renal brand or texture. There is more than one way to get there.