End stage (stage four) renal failure. There may be some medication options but mostly it is just cuddle her lots and quality time. They do not seem to do the pushing fluids thing over here that two of you have done for cats in renal failure in the US - either that or she is just beyond that. Apparently she will not be in any pain and, while we can keep her interested in some food (she is on tuna tinned in spring water right now which she loves), we do not need to consider euthanasia for now. That means that vets bills will not be huge but we still cannot really afford *any* vets bills to be honest.
A link to my previous post.
P.S. Thank you all for the donations. If we do not need it for Smudge's care we will donate it to the Cat's Protection League.