I've just realized we might be talking about the wrong condition. We are talking about Chronic Renal Failure, which is often seen in older cats and comes on very gradually, although cats don't show it until they have lost about 70% of their kidney function and then the symptoms become acute.

There is also Acute Renal Failure. Is this what your Princess has? Even though this condition is more serious, having your vet say she has a good chance is definitely good news. All the vets I've worked with have been extremely careful not to sound positive unless they are as sure as they can be that the pet will get well.

Do you know what medications Princess is on? If it's acute renal failure, do they think it was caused by an infection? Is she on antibiotics? Are they trying to balance her electrolytes by giving potassium etc. with her fluids?

They will be giving her continuous iv fluids I should think, and that's the very best method because it provides a constant flushing of toxins out of the body and helps the kidneys to keep functioning. You give subq fluids anywhere from once a week to twice a day and the fluids take some time to get through the system.