As others have said, the more time you spend with them the better. I sit on the ground and offer them treats. As with most creatures , they are less intimidated by you once you are down on their level. My chicks walk all over my feet now and it is a challenge to get through the pen without stepping on anyone's toes. When touching or patting them come from under the chest or crop area, most birds don't like being grabbed from above , reminiscent of being clenched by the talons of a hawk perhaps. In time you will have them eating from your hand.
