I am visiting from the pre-med forums. I have a 19 year old kitty who was diagnosed with chronic renal failure yesterday. My question is: is there a "best" food for cats with this problem? I have searched the net and found that Eukanuba, Purina, Royal Canin and some other brands make vet diet foods that have low potassium/protein etc. Just wondering if there was a "gold standard" or anything. Thanks!