for the longest time... months.... i have not found an egg from any of my five silver-laced Wyandottes. They are about a year and a half old. I thought something was eating the eggs before I could get them. "something" was..... the chickens! because it seems all of them are laying eggs with no shells. They have layer feed, scratch and free range... So I'm wondering, is it the breed, the feed? Seems like they'd be getting their calcium from the layer feed and they're not so old..... What do y'all think? I read about the crushed oyster shells, the apple cider vinager..... is that the general suggestion for me too? And how do I accomplish that when they range all over and have their choice of what they eat and where they drink? Thanks for whatever suggestions I get!