My young Ameraucana layed this today. Smooth tiffany blue on one half sand paper ruff darker blue on other half. My flock is on the last day of Terramycin because of mystery illnness that killed one bird and made another close to death before treatment. They are also getting electrolytes and have had a breakfast of yogurt bread mash for a few days. What do you think and have you had an egg that felt like sand paper before?