My cat Friday is 12 years old. We've been treating him for hyperthyroid for about 12 months. We knew that he had kidney disease and started him on KD. 3 months ago, his levels were good enough that our vet didn't want to start him on medication. He hasn't been himself the last couple of days. We went back to the vet today. They did blood work. His kidneys are only functioning at 10%. There isn't much we can do. They gave him fluids and we go back tomorrow and Wednesday for more then a recheck on Thursday. I"m utterly devastated. Friday is one of my best friends. I just don't know what I'll do without him.