I am sorry his values are rising again, but I wouldnt put him on a diet or keep putting him on a drip in the hospital, I think this is a quality over quantity, both those will give him the quantity, but they will impact on his quality of life, he might get an extra year but he will be unhappy cos his food is restricted and you might not see as much of him as he will be at the vets so much on a drip, and if the diet doesnt slow things down, you will feel even worse at putting him through the stress for nothing, and ultimately CRF isn't cureable, only manageable, and there is only so much we can do for them - plus the stress of constantly going to the vets and having his food restricted might speed things up anyway. I agree it is easier when they look ill though.