Some people don't know that sometimes chickens lay eggs with no shells. Heck I didn't know until chickens showed up at my house. What causes this? Well, mostly likely it's a lack of calcium. To fix the problem, you give the chickens oyster shell and it makes their shells harder and thicker. We don't seem to have that problem, but I will up their oyster shell a bit. We mainly feed their own shells back to them as their main form of calcium, and suprisingly, they love it!
I thought I'd share a few photos of what this egg looks like.
This is a case where it's hard to translate what it's like, with just a photo, so I decided to share a little video with you. Excuse that it's a little out of focus, I have a tendancy to get too close. :/
(this is why I'm a photographer and not a videographer)