What is grit? I never heard of it til just a few days ago when i got my chicks and i saw somewhere online where someone said to add grit (said it was like gravel) to their food so they can grind up their food, is this true? How and when do i give it to them? right now their just on chick starter and we tossed in some grass in their cage and they were pecking here and there at that but not much, so can someone let me know about grit? Thank You!