Thanks Kathy - that's kind of what I'm seeing but all of the five dozen eggs I put in bator developed and are pipping right now and Nellie bought a dozen and has 10 about to pip so that's why I'm asking if others are seeing something like this in their Orp eggs. My Orp eggs are also very large. Most people that have ordered them comment on how extra large, jumbo, they are even when compared with Orp eggs they are already getting from their own Orps.
Maybe your jumbo eggs are porous because the "factory" has to use so much more calcium. Or it's genetic. If they were mine, I would try more calcium and some vitamins and see if that changes them. It's not like your chickens aren't healthy and well fed. But to lay jumbo eggs , I think, may take alot more- I guess domestication of chickens does have it's cons.
BTW, I'm answering you here because I saw your name and had to go reread your blog! It reads like a good book! I love it!