I have three girls that are 8 weeks old, fully feathered and I would like to put them outside with my big girl silkies (they are about 10-12 months old and all very sweet). My only concern is their food. The little girls are currently on starter and I know they should stay on it for a while. The big girls are on layer, which I have read is not really good for younger chicks because of the extra calcium. I have read that it would be better to feed them all starter feed and offer oyster shells for extra calcium to the big girls than to feed them all layer feed now. Has anyone else hadd any experience with this type of situation? I know that the ideal situation would be to keep them separate for a while longer, but they are getting pretty big and we really don't have another place to keep them. Anyy suggestions??