I'm trying to figure out what feed to buy for 400 chicks, and the chick grower costs a lot more than the starter. Before I make any decisions, what is the importance in switching chicks to a grower? I know that a grower has less protein, but what effects does 20% instead of 18% protein have on a chick? Do I need to switch to grower feed? Or would my chicks be fine on a starter until they begin to lay?