I'm officially a chicken mama! My daughter and I brought home 3 mystery bantams (either buff cochins or millie fleurs - and hopefully pullets ) this afternoon. We have them in the brooder with clean water and chick scratch (Manna Pro non-medicated started - which I hope is good). But I've not gotten them any grit yet. (They're a week old & not old enough to go outside yet so they won't pick up pebbles, etc on their own yet.) Should I go get them some or is there some alternative (such as sand) that is recommended?