My ladies have recently started laying. They all lay light brown/tan colored eggs. Twice now, I have gotten a brown egg with white spots on it. On one of them the spots were a bit large and on the other they were so tiny it almost looks like the egg is covered in lace. When I first saw it, the one with the larger spots, I thought the chicken had laid the egg in a spot that had DE and I tried to wash it off. It looked like it came clean. But then once it dried, the spots were there again. Same thing happend to the other one. I'm not really concerned, I just think it's kind of odd. Anyone else seen this?