Right now 4 of my 10 girls are laying and they are 22 weeks old. Right now I have them on grower feed with a container for Oyster shells. Is it fine to keep it like this, and when should I fully switch over? If they never all are laying, what would be my best option. Right now I have them mainly on Scratch & Peck feed, but also plan to use Blue Seal Organic on occasion, thank you.