have nine pullets about 13 weeks one may be a little older but not sure got a shell less egg the other day and a good egg today . they all have been eating layer feed for about 2 weeks (bought it by accident) just bought the proper grower feed how should i feed now that someones laying?1 feeder with grower and one with layer ? and now oyster shell....what about the scratch throw it on the ground or in a feeder? holy choices ..... what should i do? advice please