I feed mine fermented mash, and a free feed of
Manna Pro. They are just moving from the Starter Grower to Layer pellets this coming week. We will see what the ladies think about that. They love tomato pieces. I give the them cores and pieces that have those cracks when I cut up tomatoes. I just opened a tomato and found a bunch of tiny sugar ants setting up shop in where there was a tiny crack - I washed all the ants down the drain and cut bits for the chickens.
They also like bits of cherry. Wild birds got all my strawberries this spring and my blueberries, too. I need to spread some bird nets to save some for my family and the ladies. They seem to like all the herbs I offer them as well: basil, African blue basil, Thai basil, oregano, Greek oregano, lemon thyme, sage, rosemary and something called basil thyme.
I started growing Malabar spinach to take the place of my spinach and lettuce in the hot weather. They seem to like that too. Grows really well as a vine once it gets going. I give them spinach and kale when I can and they eat that up. I haven't tried broccoli. Will try it. They LOVE leftover corn on the cob (when eaten with out butter or salt). There are always bits of kernels left that they love to pick over. They start crooning when they see it. I also give them the husks but they are not so wild about that.
I also give them dandelion, artemisia, chickweed, clover, and grass bits, petals from bachelor buttons, dandelions and marigolds. They mealworms and darkling beetles once a week (which they adore) or sometimes a red wiggler from my compost bin. To my knowledge, they have not caught a mouse yet, but I am rooting for them. They are not quite old enough (and my garden is not quite finished enough or enclosed enough) to forage. But I know they want to come out and look for themselves.