I checked out a book from our library & it said that, quote, "there has never been a confirmed case of salmonella in a Marans egg" (not that there are many reports in other breeds, OK? I already checked that out) but, supposedly because the molecular structure of the shell in Marans eggs is denser than other breeds. Myth or Fact? Curious minds want to know your opinion! We do feel that the eggs from our Marans are thicker & harder to crack than the others; but -- what do you Real breeders think?