Holly says thank you for your kind messages!
Uncle John, the vet, rang today, her organs are fine, but is concerned she may possibly have some bacterial infection (I'm going to start a new thread on this).
Thanks for the info on insurance - I didn't think you could insure older cats - but the RSPCA have said they will pay for all her vets bills.
Ela, Holly was kept in a private cattery and I was told unless there is something obviously wrong, they simply can't afford to give every cat who comes in a comprehensive health check , I agree not ideal, but I guess they can only do what funds allow.
J