That is why I have asked several times about checking her crop function early morning before she eats of drinks. As you learn about hens, they may have something going on with a reproductive infection, internal laying, worms, or water belly, that puts a lot of pressure on the internal organs. That can slow the crop and gizzard, and may cause impacted or sour crop. A pendulous crop is when the crop has become overstretched, and never empties. If the crop does not empty or function normally, the chicken then doesn’t get enough food and nutrients, and may lose weight in the breast muscles. Long winded answer, but when we ask a question about checking her crop to see if it is empty or full, an answer may help us know what might be wrong.