I have 5 hens, two of which are about 3 months old and the other three are about 6-7 months and will be laying soon (I'm not sure of exact ages). I've heard mixed opinions on this matter, so I'm throwing it out to BYC for review. Is it okay to start introducing a layer feed into the coop, or will it harm the younger ones? They're all still on chick grower right now. I was thinking of putting out two separate troughs of food out, but I doubt that they will differentiate. The breeder suggested putting out crushed eggshell but didn't seem to think that the layer would have any negative effects. Others have told me to just go ahead with the layer and that it won't harm the younger birds. Still others have said that the added calcium isn't good for the young birds. Anybody have any advice? Thanks!