I've tried out different food stuff: they like bread, although it seems a little bit hard for them to swallow. Perhaps it is to dry. The gentlemen didn't like wheat flakes at all. They do like muesli and the one in the middle picks out the raisins. This is parrot feed, which they like a lot. The one on the right especially likes the maize, which the middle one doesn't eat. They don't eat the peanuts, they leave them for the other birds.
Little movie: vimeo.com/2985628