Your story is not unlike my own 3 years ago, when I first discovered the dreadful truth of how quickly kidney
disease can deteriorate once symptoms
start. The problem is, as you may know, outward observable symptoms don't show until stage 4, the final stage of kidney disease. By this stage, there is very little that can be done, other than palliative management, IV fluids, diet change, and all those things you already did for your best friend and companion.