I went out to collect my eggs and found this egg in the nest box. I know the red stuff is blood, the egg was a lil bit bigger than her normal ones, but not much. But what the heck is up with the blue stuff? And the funky lines? I figure maybe she's practicing to lay a special 4th of July egg. Is it anything I should worry about? When I washed it the red came off really easy, and if I scrubbed hard some of the blue did.