I have 6 week old chicks and want to start introducing them to my mama hens inside the coop, but I'm concerned about how to keep the chicks from eating the layer feed due to the high calcium. I've been reading that I should switch to a regular grower feed for both the chicks and mama hens and supply the mama's with oyster shell to counterbalance the lack of calcium in the grower feed? I'm a small local FFA member supplying eggs for friends and family in the community so my mama's can't be effected by the change in feed. Please let me know... Thank you!!!