Originally Answered: Renal Cat Food: Hill's or Royal Canin?
Hi Atefe,
Apologies for the delay in replying to your message and thanks for reaching out to us with your question.
The basis of any good renal diet is highly digestible proteins (some diets have restricted proteins), low phosphorus, low sodium and added omega-3s. Wet renal foods are a great choice as cats with kidney disease are prone to dehydration. The high moisture content of wet food helps to prevent this.
We have a list of renal diets that we reviewed and compared here;
https://cats.com/best-cat-food-for-kidney-disease
In this review, you'll notice that Royal Canin came out on top as the best renal food in our opinion, with Hills running up as our second favourite. Both foods are very good options for cats with renal disease as they have all the qualities that we look for in a renal diet. If your vet has recommended Royal Canin, it might be a good idea to try that one and see how your cat likes it.
Hope that helps,
Aisling