Funny… I was reading up on this just last night!Exactly, thanks!
I had an idea about the loose poo after reading about sorrel and oxalic acid. I read it can be a diuretic in humans when consumed in enough quantity. Also I know from possibly outdated nutrition teachings that oxalic acid is thought to bind with the calcium in foods like brocolli and kale, making the calcium less available to the body. I thought it would work the other way too. In the absence of additional calcium to bind it up, could the oxalic acid in the dandelion, grass and other greens she was eating be causing the loose poo through a diuretic action? This would be why she seemed to drink so much also.
She is molting and it is Fall. She is laying less and never went to the oyster shell cups that I saw (however much she used to eat). She was not eating the pellets or mash due to the molt. The only calcium she was likely getting then was in the greens, and that's not enough to compensate for the oxalic acid in them. She had both digging-only days and days I saw her go after greens exclusively (when I watched her), and she always ate the greens I offered her.
Just a thought.