Thank you!! We will give this a shot today!! I have considered worms potentially. I actually was wondering if one of the polishes we had due had an overload based on the really frothy yellow poop but we also had some cocci so it could have been that. No we have never dewormed them. What should I use for that? I actually just read an article about issues with walking related to worms so it made me wonder.
Dosage is here; follow posts #2 and #9:
https://www.backyardchickens.com/threads/safeguard-dosage.1437427/