Peafowl
The hen teaches her chicks what to eat by putting her beak down at a chosen bug, grain, seed, or leaf and making a throaty "grock" sound. The chick put its beak against the mother's, follows the beak to the tip, and eats whatever it points at. The chicks can learn what to eat from a hen of another species, but, unlike baby chickens, peachicks need to be shown what to eat. Chicks hatched in a hatchery can starve to death if there is no hen to teach them what to eat.