Perhaps you are referring to internal laying or acites?Is there any puffiness or swelling in her rear? I had a hen that had a lot of your hen's symptoms this past spring/summer. After reading here I assumed that it was due to the condition (can't remember the name) where eggs build up in the system (not egg binding). I assumed she was going to die, but once it got into fall and flock egg laying diminished, she got back to normal.