Filou is fine in terms of behavior but he still doesn't eat enough. He's far to thin and he moves not as smooth as he used to. We have been to the vet today for the last antibiotic shot and she is just as worried as I am. She says his creatinine level is really high and that means that all the organs will be affected. He has anemia and too much acid in the stomach which makes him lose his appetite. His legs and hips seem ok- so he may have arthritic changes in his joints (just like me) and we have decided against medication because he hates being pilled and I can see that he doesn't like this going to the vet anyway.
The kidney failure is also the reason why his immune system is not what it used to be.
We all hope he'll come back and gets over this episode but there is no guarantee.
He may eat whatever he wants- he cannot lose more weight. So today it was an egg yolk and some minced beef. I sat close to him while he had the egg yolk and he seemed to enjoy it
If he doesn't gain weight it is a question of weeks or months.
He gives kitty kisses, purrs and behaves as his usual little self. He even climbed the cat tree to the top - and he does it mainly with the front paws.

So while I am sitting here in tears you who pray for him pray that he still has a happy period and no pain.
I am not looking into lots of medication. If I tried to pill him he would go into hide and certainly not be happy. I can only decide for him as I would decide for myself.