Pollo,
I'm having a similar issue with a 2 1/2 year old NHR hen. Her crop just doesn't empty and in the morning sometimes there's a hard little lump there.
She's eating, drinking a bit more than usual, scratching and running around with her flock. She's not lost condition and the only time I've seen it bother her is after she ate some scratch made of racehorse oats, hard wheat and BOSS. (I've stopped that) She just hunched up for a bit.
One problem is that she has watering, sometimes projectile, stools and sometimes she spits up some water and has been doing so for a couple of months. Sometimes there's some normal looking fecal matter in her stools. But she's acting normal despite this.
I've had her caged during the day for the past couple of days. Yesterday she got water and a bit of yogurt. Today I mixed applesauce, baby food beef, yogurt, pumpkin, a small bit of digestive powder, and a small amount of Karo syrup and fed her small meals throughout the day. She went to bed after a snack of yogurt and olive oil.
I have to leave town and my chicken sitter won't care for her like this so I'm hoping that she'll be okay. I've read the posts on how to get them to vomit up a clogged crop and I just don't think I can do that. I'm hoping that the ACV in the water and the yogurt will help.
I'm wondering if their crop ever goes back into shape.
Mary