In addition to the crop impaction treatment (stop feeding, hydrate with coconut oil and vitamin water, rest) I think you may have to start treatment for egg bound hens by reading the threads about the hens with white discharge. Maybe do the glove and vaseline treatment and warm bath treatments. Your problem sounds like a physical one, not an antibiotic bacterial one, but that depends on your location. If it is one egg, she may pass it if you do the treatments and get her resting ASAP. Did you fond out how the other hen died? Was it bacterial?