I got home and decided to spend a bit of dedicated time with Calypso before letting the rest of the parrots out. He's a bit more reserved, so can fall between the cracks if I just focus on the parrots who demand attention.
He was sitting on my knee and I gave him a cracker. It was a tiny, caique-sized piece. Given the crumbs on my pants, I'm not sure how much of this cracker he ingested!