Every morning, in order to "distract" the flock which wishes to mill about ME when I go out into the yard, I toss out 3 big ol' handsful of BOSS into the center of the run. Then I can work on filling feeders and checking waterers and scooping poop without tripping over chickens (and the two Cayuga ducks).
I have about 24 chickens and two ducks right now.
Occasionally, in the afternoons, I will hand feed BOSS to most of the flock, tossing some to the lower ranking girls who never get up to my hands due to the gals higher in the pecking order monopolizing the space directly in front of me. They all get a treat every afternoon, but it's not always BOSS.
The common afternoon hand-fed treats are dry, rolled oats (the "old fashioned oat-meal" not the quick cooking kind), shredded mozzarella cheese, generic puffed rice cereal (no added sodium or sugar), grapes, that sort of thing.
I also treat with mealworms, but never from my hands. *shuddering*