I have an 18 year old cat who, until about the last year or so, has seemed really well.
He's gradually been loosing weight and condition. He has long hair and has been getting mats, which I trim out.
About 6 weeks ago, he was diagnosed with an overactive thyroid, and started on medication for it. Initial tests looked like it was helping.
However, now that the hyper/starving thyroid related behaviour has stopped, he just seems confused all the time. He's sleeping in the litter tray, and often has dried poo/litter stuck to his fur. He's also still really skinny, (he's 3.4kg, his normal weight was 5.3) and his coat is in terrible condition - dusty etc, I think he's stopped grooming himself.
He also keeps getting beaten up by other local cats when he goes out, but is miserable when made to stay in.
I guess I feel like the quality of life is going, so maybe it would be better to put him to sleep. But on the flip side, I feel he's not ill per se, so I should just try to keep him going for however long we have until nature takes its course. Then I feel like that would be for my benefit rather than his.
I'd really appreciate any advice or experiences.