Quote Originally Posted by Grace
I seem to recall hearing at one point - if a cat poops outside the box, it is behavioral; if it pees outside, it is medical.

Not true.

There are several medical issues that can cause pooping outside the box, including a very nasty problem called Megacolon. My Jack has this problem and requires pumpkin in his food, regular cat laxitive, and another laxitive daily called Enulose, as well as occasional enemas. Jack blames his litterbox for the pain when he poops so he tends to find other places when he starts having a bad flare up.

We just admitted a cat to the hospital today that has a mild form of Megacolon and is severely constipated now and had been pooping outside the box prior to being totally constipated. We gave it 4 enemas today alone.