I, too, am sorry to hear of your cat that has CRF. My RB Puddy lived a good life w/it for years though, and went to the Bridge at age 14 but she had many other health issues besides CRF. I gave her fluids every day for quite some time. Now my 20 1/2 year old Pidgelet has it and I'm giving her fluids every other day as well. So don't despair. Keep the faythe.