I have some week old chicks and should have a few more hatching in 3 weeks. They are kept separated from the big girls till they are big enough to all go in the main coop. My question is "when I integrate the young ones with the main flock, they should still be on chick food, while the big girls will be on layers. How can I make sure they eat their own food?" The newly hatched are all big breeds so I am hoping that by the time they are 12-14 weeks they will be big enough to move in with the big girls.