WOW!!!  I'm not going to try to quote all the good posts over 3 pages since I was here this morning...

 And I'm not going to call out users cause I'll miss someone.  That said, I'm a foodie too.  I've been inside a commercial egg operation and seen it first hand--yet that didn't deter me from eggs.  I've also spent nine years living overseas.  When I was a kid, my parents fried eggs made me yak, yet my grandfather made the most delicious fried eggs.  Only now am I able to replicate what he made...  What I didn't realize when I was 8, he had his own chickens.  He collected fresh eggs and fried them up in bacon fat.  The whites were firm and flavorful and the orange yolks were fantastic. My parents got eggs from the packer, wiggly whites and pale yellow yolks.
OK enough on that...  
Now for the story I wasn't going to tell--but given all the input seems appropriate now. Today, I always break each egg into a bowl and then move it to another bowl.  I do this largely because I have ducks and turkeys as well as chickens.  Let's talk about ducks for a second.  They are notorious for dropping eggs where ever they are when they feel like it and hiding them.  There has been more than one occasion where I've found a clutch of eggs in the morning on top of an old clutch.  Also, since ducks will not use a nest box, the eggs always come with mud and poop on them, unless they have really fresh straw.  Also, duck membranes are tough, not as tough as turkeys but really tough.  So its hard to crack the egg.  One day I was making eggs and grabbed one from the "old" clutch...  I'm guessing it had been in over 100 degree temps for days. When it hit the pan, everyone left the house as the stench was unbearable.  Point is that if your birds hide eggs you may not know how old they are.
Turkey eggs...  Fantastic flavor--but they have shoe leather for a membrane.  If I seriously push when cracking a duck egg on the edge of a glass bowl, I can penetrate the membrane...  Not so for a turkey egg.  In a best world scenario, you'll get a small handful of fragments of shell when trying to break a turkey egg.  I've taken to boiling them or using them in scrambled eggs because they are so tough.  And Yes, turkeys hide eggs too.
Ok, I'm just about done here... Sorry for being sooo long winded.  My kids grew up on four different continents. They played and ate dirt in the gardens and ate natural foods. Less than a year after we moved to DC they started to develop allergies.  I took to buying food from the Amish and the allergies went away.  I can't identify what the root cause is--but I'm certain that factory farmed food is responsible for most of our health problems today.  Today I have poultry, next is pork, followed by beef and maybe sheep and goats.  My granddaughter has been eating locally grown organic food since she moved off formula.  We drink raw milk and eat cheese that I made from raw milk.   We are purging the chemicals.  Again sorry this was soooo long.
