Ours is fourteen years old and suffers from multiple medical issues, one of which is kidney failure. Our Vet has been treating her with fluid treatments for over a year and a half now, and her last blood test showed her kidneys had improved slightly, so there is hope. Unfortunately for our girl, the same blood work also shows her liver isn't doing all that well. So far she seems to feel well and is eating and drinking, so the treatments continue. We are adjusting some of her meds, hoping that her liver will at least stabilize. Its all kind of a balancing act, especially when they get older.