My heart truly goes out to you at this very difficult time, i know exactly what it is like having a cat that won't eat, Ash is the same on and off with his CRF, you try everything with no success sometimes,then all of sudden yes my boy eats, i know Sydney has a lot of problems, and i can only hope with all my heart you find something he can eat and soon, i will be thinking of you, all paws and fingers crossed Sydney makes a turn around and eats, come on Sydney you can do it. HUGS