I have used stool softeners for impacted crops. I have seen lots of vets recommend Metamucil (refer to the dosing I provided on post 8# for that). As an alternative, you could use the Dulcolax.
Sorry to hear she's feeling unwell.
Could you post a few pictures of her poop? Could you post a video of her moving around? Can you feel her crop area, how does it feel?
A hard abdominal area, lethargy, lack of eating, and watery stools are all signs that would point towards some sort of...