Thanks everyone for your advice on caring for my pacman, unfortunately it died about two weeks ago despite my best efforts. It grew in size during the several days I was force feeding, but never pooped. I believe it was impacted ever since I got it and that no mater what I did the outcome was inevitable. I will use what I have learned here to better care for my next pacman. And on a happier note, I picked up a new pacman today that seems to be very healthy!