So I am brand new to owning chickens. I have done a ton of research so I knew what I was getting into and to ensure that my little guys have the best chance. I just want to double check that I don't need to be feeding grit in the brooder? The guy at the farm and ranch store I visited told I don't need it right away. When should I have this available to them? Thank you so much, I have spent a lot of time on this site it has been super helpful! So pumped to get my little guys.