I am no authority, but I do know from experience as a breeder of birds, poultry hens do not "regurgitate" the food for the chicks like backyard birds and parrots, etc. do. The chicks come out of the nest, and need some corn meal or chick mash to eat. The hen will take them out and scratch and pick and show them how to eat. Be very careful the small dish with water in it is not too big or deep or the chicks will drown. They are into everything when they start to walk around and it is best to have one of those water containers that only has the edge with water in when you have the chicks. The mash can be purchased at any agway, feed store or tractor supply. They just need to have a place to scratch and pick. I used to break up cornbread and they love that. The neighbor's chicks here now are range and they even eat wild bird seed. They love bugs and veggies too. I do think it is better to give them Mash to start with because it has all they need for good nutrition. If I remember, we also used to have some grit for our flock when we had chicks too. That is your own personal decision as to what you want to do with these chicks. Forgive me for butting in, but I wanted to share with you what we did when we had chicks.