Cat doesn't seem to know how to poop?

Alright, Caly is my new kitty (but I've had years of cat-experience) and I got her about a month ago. 2 years old. She seems to have problems getting the poop off of her. She will come out with poo stuck to her and I have to remove it with a wet toilet paper (does not like -- I don't blame her). It usually just falls off, or is a little stuck, and she doesn't seem to be in any pain or discomfort- other than the customary glare to the human touching her bum. She has been quite active, playing.
She is a short-haired manx with only a tuft of fur - so I wondered if it's because she doesn't have a tail to knock it off?
I saw a vet a few weeks ago, but it was just a free "new kitty" visit, and the problem hadn't been obvious at that time. (she had done it, but I attributed it to being nervous about a new litter box) I wonder if I need to take her in for another check up? Or am I just being an over-paranoid Mama who needs to stop freaking?

Asked by Member 1088571 on Jan 31st 2012 Tagged poop, food, manx in Other Health & Wellness