Question...I have broken up the egg shells in scrambled eggs for my 13 laying hens...yes, they ate them all up...no problems...but I read here on the forum that I am to bake my eggs shells in a 400 degree oven before feeding them crushed up to my hens...? Is that correct? Do I have to bake them? I baked a dozen shells yesterday and fed them to the hens and they gobbled them up like kids with potato chips... So do I bake them first????