Ah, great advice! Thank you,! I'll look into crop issues. I hadn't considered that. With previous episodes, I though of heat or treats, but this time neither were a factor. We live in Vancouver WA and have had some significant heat spells, but they didn't coincide with her diarrhea.
This is a good resource on BYC and is often pointed to by some of the most experienced and trusted folks on the site:
https://www.backyardchickens.com/ar...w-to-know-which-one-youre-dealing-with.73607/