From the inside of my new carton of Great Day brand eggs: "Our hens are fed an all natural, vegetarian diet rich in nutritious grains, vitamins, and minerals. Great Day hens are never fed animal by-products, antibiotics or hormones--making our hens happier and our eggs better!It's simply the way eggs should be."
Anyone who has ever dealt with chickens will wonder if these hens are happier or not. Hens are omnivores. Not only do they LIKE to eat bugs, they also eat their own eggs sometimes! Giving them a vegetarian diet might make the PETA people happier, but I doubt it will make the hens happier.