One of my girls just started laying this week. She pecked a hole her first egg but didn't break the membrane and didn't eat it, just left it there and walked away. Today she literally staked out one of my other layers, wouldn't even come for treats! As soon as the other girl laid, she went in there and pecked her egg, too! She just cracked it, didn't even make a hole, and walked away again! What is going on?? Why is she doing this? She is just damaging the egg enough that we can't use it! Ugh! All of the girls shells are hard and in good condition (they sometimes even have excess calcuim bumps on them). They free range around our backyard and have plenty of food and water. While I haven't been offering oyster shell, they get yogurt and cottage cheese (which they LOVE, when I offered oyster shell they all completely avoided it!)! I can put golf balls in there but I really don't understand why she would peck it once and walk away.