U_Stormcrow
Crossing the Road
Pardon me for butting in, Storm, but I know there is a good article somewhere regarding crop issues but don't know where to find it or who the author is. Something like "how to know what crop issue you're dealing with and how to treat it"? Not sure if it's by @azygous, @EggCentric or @Wyorp Rock, but pretty sure it's one of them. Do you know where it can be found? (I'm no good at linking articles, sorry.)
OP, sorry your hen is ill and wishing her a speedy recovery.
Not butting in at all. I may not know illnesses, but I know how to search, and you provided the keywords.
THIS is most likely the article you had in mind.
See also.