wondering IF he was fermenting his food? Didn't think they could get sour crop from it being fermented.That is very sad he lost his hens!
NOW I see where Bee said what she did about it being hard. (the wheat) Didn't read that before I typed the above.
Yep, they were fermenting...but there is a difference between an impacted crop and a sour crop. An impacted crop is full of a material that cannot advance any further into the digestive tract because the proventriculus (the next chamber down from the crop and in between it and the gizzard) is also full and cannot empty properly because either the substance cannot be ground up or it is very difficult to grind up. You'll often see birds with impacted crop vomiting fluids because they cannot get much water or anything else past that impaction but they are still thirsty enough to drink...and they may drink in order to try to get the impaction to move as well.