I am new to this whole chicken business. While I have had lots of experiance with much smaller birds, I know every animal is different. My husband and I built our enourmous chicken coop, and made a "nesting" area. Some of our friends have said that actual nesting boxes were not necessary. Is this true? We have 2 red stars, and 2 barred rock hens. Also, My husband bought all four for me at an auction. Our friend who has chickens of his own checked and said they had been laying eggs. Only one so far has laid. And the last four days all four eggs have been cracked and eaten. Im not sure if the shells are too soft, or if I have an egg cracking hen on my hands. I have added oyster shells into the feed starting yesterday, but if this doesnt solve my issue, what can I do?