I've posted before about my lovely 19 year-old tom. He has heart disease and epilepsy.
Very recently he's been experiencing problems while peeing. The vet couldn't get a scan of his full bladder (he did a protest pee) but think there's some kind of blockage. He's on metacam for the discomfort - the vet and I agreed at his age that intervention would be painful and unpleasant, and an anaesthetic would possibly kill him.
He's been up and down to the litter tray tonight :( and meowing inbetween. However, he's also scarfed down a tin of Sheba so not entirely poorly. To complicate matters, we've been away for a week and I don't know if his behaviour is a stress reaction, or illness. The cat sitter didn't see any urinary problems.
TL:DR. Does anyone have experience of this kind of problem with an elderly cat? How would you deal with this issue?