Hatchability drops after 10 days, but not significantly after 5 days - after all, most hens lay an egg a day until they reach 10-14 before they start incubating them, where the oldest eggs are sometimes 14 days or older. No, it's not that, it's more likely the postage was rough which is not the seller's fault at all. What COULD have been improved on the seller's behalf was that they wrapped the eggs better and included a 'fragile' label or sticker which they did not do (I also replied to another post). It was a single layer of bubble wrap around eggs wrapped in tissue in an egg carton.