Don't get upset - ok easy for me to say - when I got the same diagnosis for Sydney, I had to hold back the tears until I got to the car.
Then I started researching and learning and realized, she is in early stages and can have many more years left.
I'm feeding her the low carb diabetic diet, and adding lots of water to her food. As water is important to help the kidneys flush and function.
Yes, there will come a time when phosphorus binders, squids may be needed, but that's a long way away.
So, for now, concentrate on food and water and remember - she problem doesn't think anything is wrong with her....