mine free range all day...they get layer feed with oyster shell and crushed egg shells on the side, plenty of water...
In the summer they have access to lots of greens, but I also toss them lots of tomatoes...(Watch out if you are holding one in your hand...
they are attracted to RED) lots of garden scraps.
In the winter I supplement them with BOSS, oatmeal (warm, plain cooked) salads that I don't eat...
I give them a variety of foods, plus feed back to them scrambled eggs, rice, pasta, breads, crackers, even ground beef (you can just boil it up and feed it to them)
They compete with the outdoor cats for food at times, I put it out for the cats and the chickens chase them away to eat!
I have super healthy, well fed, girls and great eggs. Mine are chubby looking due to winter...but trust me get tons of exercise running from the
barn/coop to the house, 50 yards away...I have over 300+ acres for them, they only use what is around the buildings though.