It was housed in a 100 qm area with its male sibling. Neither the sibling nor the parents had signs of feather dystrophy or loss. Both parents had been imported from Australia 10 years previously and had produced offspring yearly, none of which exhibited feather abnormalities. Paulo, Brazil to determine the cause of the feather abnormalities. The bird's behavior, appetite, and feces appeared normal.
Feather loss is apparent over most of the body.
Symmetrical feather loss and dystrophy involved most of the body. Feather abnormalities included retained feather sheaths, clubbed and deformed feather, circumferential constrictions, and blood within feather shafts. Partial loss of crest and tail feathers also was observed. The upper portion of the beak was elongated with necrosis of the hard palate. The lower beak also appeared abnormal.