I have a 1 1/2 year old RIR hen. I have had her for 6 months. She has always laid an egg a day. I have noticed that over time, the shell of the eggs she lays are becoming more and more rough. They almost feel like sandpaper! Just for reference, she eats 16% layer feed, has oyster shell available, and free ranges during the day. She is a very fat and happy hen. Here are the best pics I could get. They are both the same egg, just one pic came out really light. There is no debris on those eggs. All the bumps and specks are part of the eggshell. What look like "dots of color" are rough, raised specks. Any idea what could cause this? Thanks!