It’s great that she’s still active and eating. I would switch to her feed + warm water. Make sure she’s hydrated but also don’t let her drink or eat too much that could increase the crop size. Don’t give treats.
Try researching pendulous crop as well.
Has she regurgitated any liquids since...
The crop growing is probably because she's been eating food. Does it still feel squishy, or is it hard or do you feel their feed inside her crop?
Sour crop usually causes watery poop or diarrhea.
Maybe you should isolate her and start only giving her a soft food diet and being gently (very...
Ok! Since her crop is watery and balloon like you can eliminate impaction. Impacted crops are very hard and sour crop is soft and smelly.
I've never dealt with sour crop, but I do have a hen with a permanent water-balloon feeling crop post-impaction. Are you positive the smell you are smelling...