I would feel of the crop tonight on the roost, and again first thing in the morning to see if her crop has emptied. She may need treatment for impacted crop if there is still food in the morning, and if it is hard or doughy.
Sorry about your hen. The neck movements she was making, if not caused by adjusting the crop, can be a neurological symptom. That is why I suggested check ing the crop to make sure it was empty in morning. I now worry a little that the neck movements and now her paralyzed leg may be a sign of Mareks disease. Mareks can affect the brain, the nerves, the skin, cause tumors in organs, and sometimes affect the eyes. MKe sure that she is placed near food and water, and if she is being picked on by the others, separate her. Hopefully, it is not Mareks, but an injury, but here is some reading about the disease to learn how it affects chickens: