Hmmm, yes, scratching posts are desirable, highly desirable. The tricky part is that different cats have different things they like to scratch. My dynamic duo both prefer scratch posts made out of carpet the most, then (distant second) those made out of sissal. I've never seen them use the cardboard ones that hang from doors, although the one in the bathroom 'self-destructed' a month or so ago -- it was 3 years old. It had some use, but I never saw any of them at it.

I have a cat tree with a built in post, some kitty condos, and a couple stand alone posts, and a few that hang from door knobs. How old is Clive? If he's 6 months or older and likes catnip, there is a spray you can use that will make the posts more attractive to him, works pretty well here at least.

Good luck!

Oh, Cassy adores stretching and scratching combined in one. I'm planning on getting a super-size post once my employment situation settles down.