My EE does the same thing. She acts fine and not all her eggs are like that. Hers are generally the hardest in the bunch. I heard somewhere that some chickens don't like the o-shell so it has to be spiced up in some way. I have 3 kids, 3 dogs, a cat, 50 chickens and 11 goats so I really don't have time to make a special meal for one chicken.
My husband works with a guy who eats 20 hard boiled eggs in one sitting and he saves out all the yolks for our chickens. Occasionally I crunch up some of their eggshell in the hard boiled eggs and mash them all up so they don't have a choice but to eat the shells (calcium).
