I've noticed lately that if I buy eggs from different places, they crack differently! I bought a 90-pack of eggs at Sam's Club yesterday and when I cracked them the eggshells shattered and I had to pick them out before dumping the eggs into the cake mix! Every-single-egg did this! However, when I buy them at WalMart, they literally just crack right down the middle....no shattering and no shells!
Does anyone know if "how they crack" reflects if they are fresher? Just wondering!
Cammie
My grandmother had chickens and hopefully some one here will back me on this... 
She never used "fresh" eggs for a boiled egg. The shells would stick to the white and she would always complain that her deviled eggs looked ugly if she had to use them.
She used a sharpy marker and put the date on the top of each egg, so when she was baking, or boiling she knew which ones she wanted to use.
I would say the freshness definately makes a difference in the way the shell cracks.
it all has to do with the age of the egg. An eggshell is porous and as it ages more oxygen filters thru the shell, this is also why fresh eggs are very full and 'perky' and you should be able to see three distinct layers in it. The more Oxygen gets thru the shells the thinner it gets until it starts to go off. so the eggs you got sound like they were very old
HTH
This is my understanding from word of mouth. Can not verify it. The amount of calcium effects the shell. The thinner the shell the less calcium. This can come from diet or aging hens. It should not make in egg content. But they are the 
to work with. Hope this helps.
In class we were told that the rougher an egg was the fresher it is(you know the texture) and the smoother, it is the opposite and since being told that i see it to be true--a thin shell comes from how often the chicken reproduces and the climate the chicken lives in 
hth
VERY good information to know....thanks everyone! I wasn't happy with Sam's Club product years ago and am not sure why I renewed my membership! I'll stick with my Walmart eggs! I'm off to get more now! Oh, also, the ones from Sam's say Grade A and they are also Grade A at my WalMart....I only buy Grade A.
Thanks, again!
Cammie
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