Yes I was just suggesting pumpkin as something to try, if anything doesn't work or makes things worse its definitely best to stop doing it, even if everyone and the vet swears by it. In this case I think it is past the point of just trying different types of fiber/remedies anyway since there is abdominal swelling/weight loss/bad breath/not able to make it to the litter box etc.. If it is just digestive problems that is great but there could very well be an underlying illness like rainbow mentioned. If there isn't now one will likely develop if she can't get her digestion on track.
I disapprove of what you say, but I will defend to the death your right to say it. ~Voltaire