We use preformatrin ultra for wet food, not sure if it’s sold outside of Canada. It’s decent and very comparable in price to the iams perfect portions (though sold in big cans vs portioned bits). I tried the Tiki Cat brand on recommendation from our adoption person and it is quite well rated but my cats didn’t really like it. Whatever brand you use, it’s always good to add a bit of extra water to it to make sure kitties are getting enough hydration as that’s where kidney problems really stem from. A fountain helps too!

I used to give my cat Nutro for dry food until we switched to prescription but apparently they’re also owned by mars now…