I wish my chickens were like that!! They won't let me get 5 feet unless they come to me!!
My lovely Haan and Kip!! But you can't see Kip...Haan is a BIG photo hog( Or should I say 'chicken' )
Tip - do you lock yours up at night and then let them out each morning? - take feed and water up at night (however you house/routine is) in the AM's take the water out for them and wait a bit to feed them, they're going to be hungry. Sit out in the yard or run if they are penned, sit low (I use a cinder block) and have whatever their favorite treat is (mine its mealworms, tomatoes, and bread) say bread (its easier) and sprinkle it near by a bit away, and then some around your feet. or even their regular feed or treat scratch will work. Do this any morning you can, the birds get into the routine and start really seeing you as being the provider and the "awesome treat lady with the yummies" my birds even the not so friendly will jump as I'm walking across the yard to try and snag my bag or basket of treats, and be all up under my feet, and if I sit in a chair with the larger birds they are under, around, on the back of the chair, etc cause they all want to be the first to eat. Hold out food for the brave ones and let them get a little extra for enticement for eating from your hand. I have won over a number of birds this way, some I still can't catch or handle easily, but they aren't afraid of me and stay close or even all up in my business when I seem interesting to them. lol
Hope this helps a bit!