I will carry buckets of their feed in their pasture as we have no stalls up and they all need supplements. My QH I've owned for 5 years will come close to me but has NEVER tried to strike out at me in any other way. I use to carry a 4' whip when I went in and my other two learned that they can only come so close before they will get a tap and they would back away. Now I have one in a 'stall' made of round pen panels, and the other two out in the 'arena' of the barn till I get stalls up. I or mom will stand inbetween the two and they will all eat their food once the two paints are done I will let the one out of the stall and they will stand near my QH while he finishes they all know that you don't mess with him or me when food is out there. Or any other time as they all have wonderful ground mannors.
They never bite at our hands when we give out treats they all learn right away they will nudge everyonce and a while but never lip at us or they get flicked in the nose.