I agree Marquisella, that would make me angry. I have never fed any of my birds grit and they do just fine. They all have access to the outside, except for the chicks of course but they only get feed until 4 weeks when I kick them out.
I'm up to 14 chicks now out of 34 eggs. Still lots to go!
Wow ...Congrats ! what if they all hatch ...you will really be buried in chicks ...