Greetings, I have an RIR about 8 months old who lays a very rough textured egg. It almost feels like it got rolled in sand or very gritty sand paper so to speak. When dry, the grit is slightly darker than the egg shell color. When wet, they're a rust or GA clay color, as we would say down here. Is this normal? The other two don't do this. The insides are just fine. It also tends to be more on the ends than in the middle of the shell.