I keep getting lectured on drinking more, but I drink 2 litres per day minimum, usually much more. I have a 1.5ltr bottle full of ice-cold water with me just now. I have been getting regular Kidney Function tests due to drug and health issues. Like ummmm I eat ice, not all the time but I love it. I buy 2ltr bags of Scottish water.
My little boy cat has Kidney Failure and is supposed to eat a special diet. He says that it vile and won't eat it. When he eats normal food he has HUGE wees in his litter tray.
It's frustrating trying to coax him into eating his expensive medicinal food, but life is complicated enough without spending time arguing with a cat.