I have a female cat that is about a year old and she always has a dirty bum. I think that she may have been a runt of the litter and had a hard go of it as a kitten. She acts really strange sometimes and plays really funny (we are always cracking up about how different she is). Sometimes I think maybe she is brain damaged. Is that possible?? But why doesn't she clean herself like a normal cat. She walks around with a dirty brown spot all the time. I have to wipe her butt for her everyday. Anyone else have this problem??