I have six chickens in two separate coops. In one coop I have an RIR who is about 12wks old and two Australorps who are about 6wks old. I've been wondering how to switch my RIR over to layer when the time comes. Being in the same coop, I can't really feed them separately but the younger ones won't be ready for layer at that point. Should I go ahead and feed layer even though the younger ones will eat it or should I stay with chick feed even though the RIR will need layer? Thanks for any help!