Just to add another opinion - I've transitioned 6 week old birds out to the coop where sometimes the only feed is layer. I usually offer 2 types of feed, layer and grower, and sometimes alternate, but layer is usually at least 60% of what I feed.
I don't think it's a good idea to wait until they start laying to add calcium. I like to increase their stores early (sometimes too early but it is what it is) because they deplete so much laying. When mine first start laying they have nice thick shells.
I don't think it's a good idea to wait until they start laying to add calcium. I like to increase their stores early (sometimes too early but it is what it is) because they deplete so much laying. When mine first start laying they have nice thick shells.