Chickens require calcium for strong eggshells.
When they don't get a sufficient quantity the birds lay eggs with thin or even no shells (which is bad news for the owners!).
So they need oyster shell grit!
The problem is, our babies don't seem to like it, they even seem to be scared of the stuff!
Maybe they'll figure it out.
One of the neighbor's hens, Blackbird, hates one of our hens, Cutie-Pie, who hates her just as much.
They have dueled twice, totally ignoring the fence that separates them.
When chickens battle they run at each other holding themselves erect with neck feathers raised.
It's sort of intimidating, I guess.