For educational purposes, the crop is an area just past the mouth and throat where food can be held until a later time. Not all birds have crops but eagles do. When they want to move the food out of their crop and down into their 'stomach', they make a series of movements with their neck, moving the food down and down. When this is done, they can fill the crop up again if they chose to. Sometimes, the crop will not empty, thus causing problems. There a several reasons this may happen. Dehydration, food that is unusually large in size and stuck in the crop and lead poisoning are just a few reasons this happens. Our job is to determine, which one or ones may be causing the problem and go from there. One may see a huge crop on a downed bird and think they are just fine and too heavy to get off of the ground, but assuming that may seal a birds fate. I have seen many birds with enormous crops that are starving to death.
We hydrated her and emptied out her crop and got things working properly again after a few days. Since then, she has just been hanging out and we have been observing her, making sure her crop is moving normally.