I ate a few of my hens eggs the other day and found them harder to crack than normal. Does the thickness of the shell tend to remain constant throughout a period of 2 weeks. There has been no changes to her diet. She is on layers pellets and can free range round a farm throuhout the day. She is a cochin bantam (pullet). I am just wondering as i am incubating and her first egg is due to hatch tomorrow. Do thick shells make it harder for chicks to hatch out? As you can tell i am probably just paranoid. I'm going insane waiting. I had hoped it would be out by now as somebody said that bantams can hatch as early as day 18. But nothing yet. I swear i can hear peeping but i know i'm imagining it cause i go to the bator and it's silent. Unless it knows i'm coming and it shuts up.