Amstans wrote:
Any other suggestions?
It's difficult to know for sure, but just some random ideas:
1. If there is a whole bunch of stuff in one litterbox, and none in another, there may be some reason why the one litterbox is favored over the other, and there may be contention for the "good" box (i.e., another cat was using the "good" litterbox, while another cat had to "go"). You might want to try to get another "good" litterbox (size, style, location etc) if that is the issue.
2. The bed is perhaps the most "socially significant" place in the home, especially for cats privileged enough to sleep with their humans. So it could be a territorial thing, except that it's usually pee I think, not poo, for that. But you can just observe your cats and see if that might be an issue.
3. My best guess is that it was an "accident". The cat may have just "leaked" that out, since it was runny, and that it was in a "straight line" seems to me like your cat wasn't even necessarily trying to "go". The other possibility is if there have been other recent runny poos, it may have been a case of trying the litterbox, having some discomfort going there, and tried somewhere else (litterbox aversion due to medical condition).
In terms of cleaning it, it's probably good news that it's poo, because cat pee is the thing that is almost impossible to clean. Soap and water might just do it. If it were me, I'd not kick them out of the room or anything like that, I'd instead focus on resolving why it happened, making sure you help your cat with the runny poo and make sure there isn't any contention for the "good" litterbox.
That's all I got... good luck, let us know how it goes.