I have to be careful what I say outloud - I read your post to Tommy over the phone about BOSS. He came home with some. I have no idea what to do with it. I don't own a coffee grounder.
And I have only lived in this area about a year and a half. I'm not too cool with the mention of Eastern King Snake!!!!! WHAT?????? If I ever open my coop and found a snake, I would probably shoot every chicken we own trying to kill that snake.
You really don't HAVE to grind it. Even my little bantams eat them, shells and all. Just toss them on the ground and they will find every last sliver.