I was just wondering if anyone know if there is a process that happens with oyster shell before it gets to the store of if they just take oyster shells straight from shucking and smash them up. I was down at the coast recently and saw humongous mountains of oyster shell and I was wondering if I could ask them for some or if they would sell me some for cheap. My only concern is if they treat them in some way before they give them to the chickens.