I just lost my young (less than 6 months) African Gray. I purchased him at 2 months old and hand feed, ect. After weaning he appeared to be fine and healthy. About a month ago, he was listless, quiet, just not normal. Took to avian vet, they found some hemoraging in the craw, nothing else. Gave me meds to sooth the area when eating, and an antibiotic, he had infection presumably from the craw issue. Was fine, or so seemed, we left on vacation, left bird with another gray owner. 8 days later, needed to go to vet again, some thing, just not right. He died the same day, did autopsy found gizzard was VERY enlarged, no protein in his body. Vet isn't sure if birth defect or genetic. Does any one have a clue? I bought from a private person, they had raised birds, but this was their first clutch of Grays. Vet says that for some reason he was not able to maintain protein, losing somewhere, does anyone know if this gizzard issue could be a reason and if it is a defect or genetic problem?