My 2weeks old chicks just start getting grit. I just started today. Not sure how much they are eating. Here and there I saw they are pecking but not sure eating, tho. My question is.... Is it OK to bring outside to play for while?? I know if I put them out in my backyard, they are start pecking and eating green grass, etc... If they don't have enough grit in their body, it will cause trouble to play and eat outside??