So I have 12 little hens, 19 weeks old. Last week 1 RIR and 1 Black Australorp started laying. This week I think one of the other RIR's is laying. Initially the shells were a deep dark brown and shiny. But yesterday and today 2 of the eggs are pale pink and dull. Is this normal? Should I change any diet issues? I did start adding a little more Apple Cider Vinegar to their water, could that have been the change? Also, at least 9 of my little hens seem a lot crabbier! Like having a dozen 13 yr old girls stuck in a cabin at summer camp! Is this normal hormonal stuff? Can't imagine them being this ornery and being stuck in a coop during a Montana winter! They were so sweet just 2 weeks ago!