My RIR is 5 months old and just started laying eggs 3 days ago. She has laid 3 days in a row like a champ! I know we should start her on layer feed for the extra needed calcium, but my other chickens are only 12 weeks old, and not laying eggs yet. Is it ok to change the feed if the younger chicks arn't laying? Is it ok to keep my RIR on grower feed for the next couple months? Any help on this would be great!