I’m so sorry. Don’t feel bad, you did everything you could, nobody could’ve done more for her. Fly high sweet chicken and be free from sickness and pain.
Great advice, as always, given to you by Eggcessive. Definitely check her crop again in the morning and see if it is flat.
I haven’t dealt with many crop issues myself, (if that’s what you’re dealing with even) and they can be a little tricky sometimes to diagnosis. Thank goodness there are...
Is her crop empty and flat when she wakes up in the morning, have you noticed? Does it currently feel squishy like a water balloon or hard?
Have you noticed any nasal or eye discharge? Have you checked her mouth for lesions?
What is her story of how she came to be yours?
Aw I’m sorry about your chicken. Poor girl. Did you rescue her? If you have a flock I do hope you’re keeping her separated from them for a quarantine before introducing them.
Calling on the experts for advice, @Wyorp Rock @Eggcessive
How is her crop? When did she last lay?
Also how old is she...