Where exactly is the crop located? How do you tell if it is emptied? I know this seems so matter more for chicks who are handfed, do I need to know anything particular about the crop for my older bird. Also, do I need to make sure his crop is emptied every so often? Would it be emptied overnight? Either way whether I should be concerned about my older bird or not I would be interested to learn more information on this. Does anyone know any good websites about this?

Thanks in advance,