Join Date: Mar 2010
Location: Ontario, Canada
Ahh...I asked his age since what you're describing could be indicative of senility, but if he's only 5 then clearly senility is not the cause.
I would keep him separated from the kitten when you're not home or able to supervise, although if he's quarantined in the laundry room, then he presumably is separated. I would also schedule a vet visit, since his behavior (especially lying in his feces) is not normal. In the meantime, you could also try a product called Feliway, which helps to alleviate stress and reduce litter box problems. It only has a positive affect on some cats, not all, so it may or may not work for you, but it's worth a shot.