I have 28, 9 week olds and I have 5, 20ish week olds coming what should I feed them, a layer crumbles, all chick crumbles, an mixture, or is there a premade feed for this problem. PS, I would perfer to not seperate them but it could be done, and I am using chick crumbles for my 9 week olds. Thanks in ahead of time, sorry about bad spelling.