Our chicks are about 14 weeks now, and my husband just bought them layer feed because he thinks it will get them to lay eggs. I also have been scattering oyster shells in their run every day, if they want them. Acc. to the Encyclopedia of Country Living, "there can't be such a thing as too much calcium in a chicken's diet," but I've seen otherwise on the boards here. So my question is, can you "convince" a chicken to start laying with more calcium, or should you wait until you see an egg, or until they get to a certain age, before you start with the layer feed? Will it hurt them to give them oyster shells or layer feed now? If nothing else, I'll hang on to the bag and buy another bag of grower feed. Help, please!