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Do you supplement with Oyster Shells when using only Flock Raiser?
Yes, but only when they are laying heavily. Even when I don't supplement, I've not had shell problems. BUT I should say that the only birds that are on only the FR are broodies with babies, and adolescents, nearing POL. Everybody else gets both feeds, I just switch them every day or two so they don't have both feeds at once. The only exception to what I just said is my entire LF Faverolle coop is on strictly FR right now because there are 2 mommas with babies in there (I don't have to separate them out from that group), but I don't have problems with the shells in the other girls that are laying still.