I have several French Copper Marans, both blues and blacks. What would cause her eggs to be dull, chalky, rough and dry looking instead of the normal dark, speckled, shiny eggs she normally lays. This has been over the past month or so, some being normal and a few like the description above. This week I've gotten 3 eggs from her with only one being normal. She's a French Blue Copper Marans hen that started laying about 5 months ago. The egg I got tonight also had a hole about the size of a pea in one end of it. It was in a nest box with 4 other eggs and only hers had a hole in it. All other hens eggs are normal.