Time to say goodbye ?

[Twig62]

We have a cat which came from Cats Protection about 5 years ago and is believed to be around 18 years old. She is a real character and although being quite small she keeps the two much bigger male cats in their place. She can be quite loving but it has to be on her terms and stroking her without permission will result in a swipe A few months ago she was diagnosed with an over active thyroid which tablets have been controlling. Recently I noticed that she was drinking a lot of water and she has now been diagnosed with kidney failure. The vet advised putting her on a low protein diet as there isn't much more they can do. I don't know if it is connected but in the last couple of weeks the she has started weeing in the house despite the doors being opened and a clean litter tray being available. Already the living room carpet has had to be replaced and 3 rugs dumped. She is starting to look quite scraggy and keeps mooching about as if she is confused. We feel awful but are coming to the conclusion that euthanasia may be necessary. Sorry for rambling on but this is a hard decision to have to make and I wanted some opinions as to whether or not we are being reasonable in deciding to part with her. Thanks for reading.