He's got his problems with arthritis and is getting meds for those but over the last week I've started to notice some things different about his thinking.
He started getting scared of some bookmarks (yep - ordinary long cardboard bookmarks) that I'd got from the local library. I only had to lie in bed and lift a bookmark to put it in a book and he'd be rocketing down the stairs in panic.
Then that extended to books. Which originally, I guessed, might have bookmarks in them so were mentally contaminated by association - except that this evening, I tried to calm him by putting on a DVD and he was panic stricken by the remote control that I used. So it looks like he's scared, really scared, by anything that I have in my hand - in bed, in the bedroom, in his safe and warm place.
He's also been trying to get outside the inner front door. Two weeks ago he wouldn't have gone near it because he's a house cat and hated the outside.
So - he's snoozing under the throw now and the DVD is playing. (He finds telly soothing; it was what he was used to as a kit from my Mom.)
He's due to go to the vet in 10 days anyway to get his blood etc checked but I may advance that a bit if I can.
I can cope with most anything in the 'poo or pee in the wrong place' or 'being sick on the best Persian rug' line but the thought of him being frightened comes close to breaking my heart.