i have a 3 lb corn tray that i keep filled with a corn/oyster shell mix. and i throw them greens everyday and still eat all of it and come to me like theyre looking for more food. now given that i have 1 rooster and 13 hens, im not sure what would be a sufficient amount of food. ive been told that they will stop eating once theyre full, but they never stop eating as long as i continue to give them food.