My GFR was dropping, but certainly was not as low as yours. I added two vegetables with dinner. I also started getting serious about hydration. I bought a bottle with measurements . I add ice, a cup of juice (or you can put cucumber or fruit in the water overnight) and water. It is fairly easy to add in that 64 ounces. I use juice or pedialyte in the water to help with electrolytes. My kidneys have not shrunk and seem to work fine, so it seems like hydration was the issue. I just have to keep it up. I am 70.