I decided to make pickled eggs last night. Got the eggs hard boiled and started peeling...Much to my surprise the entire white of one of the eggs was a tan color (almost the exact shade of the shell.) I cut the egg open and the color went all the way through the white. The yolk looked fine. Anybody ever seen this happen? The eggs weren't right out of the coop- but they weren't older than a couple weeks. Refrigerated the entire time. Any ideas??