A while back I posted a tip from John Glemser where he told us how he trains his birds to associate his call (in his case a whistle) to being fed. You can read more about it by clicking here after you watch the video. He trains his birds while they are still in the egg and in this video you see exactly why. It’s obvious John has got this down to a science, watch the video above and see what happens when he blows the whistle it’s amazing.
See also; Glemser tip, breed your birds early
*Video* Whistle Response by John Glemser