Try giving her some coconut oil, chilled slightly and cut into small pieces to peck at. Olive oil would do the same, but give it in a little egg or food. Those will lubricate and help her to poop. If you have a QTip, you can also lubricate her vent opening with a little oil or vaseline.
It is good that she is eating. Hard to know if it is coccidiosis or something wrong in her body. Coccidiosis may slow the crop and digestion, and can cause pain. But she should be passing droppings. Is she cold?