Yesterday a weird thing happened. I bit into a hard boiled egg, and felt a crunch. Thinking I had missed a bit of shell, I spit it out. Not shell, instead I found 3 bits of what looked like the granite grit that I give the hens. Round, gray and hard. Is it possible for grit to get into an egg? Has anyone else had this happen? The egg came from my EE, mature hen, age unknown. No rooster here.Sorry for the gross spit out egg. I had been planning to give away a few eggs, but now I worry that this will happen again.