If her crop emptying it doesn’t sound like it is e impacted or sour. Now, she may have an obstruction farther down in the gizzard or intestines, but she may just have no appetite. She does sound like she is not ready to die, since she is active, wanting to be with her flock, and alert. Keep trying to tempt eating with soft cooked egg, wet chicken feed, canned cat food or tuna rinsed in water.