Ok so I got my chicks yesterday around 3 o'clock, and right now the are on paper towels over wood chips. I want to get them I have not yet gave them any treats.off the paper towels, but i am not sure if they are ready. They seem to pick and peck at the few pine shavings that come through. I am not sure if they are eating them though. So 3 questions! 1)When will they be able to get off the paper towels? 2) Do they need grit? 3) If they do, can I use sand/dirt from yard?