Lisa, if it is CRF - the chronic kind - Willy could live many good years yet with the right food (great that they BOTH like it!) and sub Q fluids when the time comes. I don't have kidney cats (yet?) but I seem to recall that a few can get by on extra wet food and going to the sub fluids later.

Thank goodness you saw to this early! Willy looks perky and healthy - I bet he'll fool the vet and then some!