Hi Dr. Kris, I have Tonkinese cats. My first from one breeder died when she was 11 (cat had liver disease also; never used this breeder again) ; new breeder & a male cat related to my first cat -- he lived until almost 15; two female sisters from the same breeder (one cat died suddenly at 10 from inoperable kidney stone) but her sister is alive but last creatinine was 2.6 (down from 3.2) -- I fed all 3 cats kibble -- hill's k/d. I recently got 2 female kittens from a different breeder (who said kidney failure was not an issue in any of her cats) and after doing research started feeding them canned food 90% with some dry food. My older cat started eating the canned food and looks wonderful. Has gained weight and her coat has never been more beautiful. She is going to the vet on Wednesday for blood tests so I will know the results of her "new" diet but she loves Wellness Core and Instinct. Is there any way to prevent my kittens from developing this problem? What is the best way to sustain my older cat? After a lot of research on the internet I think that a dry diet is the wrong way to go. Am I correct? Thank you so much.