Yes, she is a big crop girl. Pendulous crop hangs so low that the crop can never empty completely, so it keeps dragging lower, getting worse. Go look at the pattern
@Eggcessive linked to. I eventually added a small foam insert to it, and it works like a push-up bra to support the crop.
Another thing you can do, and the hen will enjoy, is to hold her and elevate the crop in one hand whille gently manipulating the crop contents to move them in an upward motion. This can empty some of the crop and make her more comfortable. Have her wear the bra 24 hours a day until the crop is emptying overnight. You will need to keep adjusting the crop to get a good fit. You'll know the fit is correct if the contents empty.