I would like to give my chicks a tray of sand to play / bath / eat eventually here, they are only a few days old right now. Is this too early? And also, we live in a freakin sand bowl. Sand everywhere. It's still under snow right now and freezing. Would it be risky to chip some of it up to thaw and dry for them at this age? Or would it be pretty bacteria / pest free because of being below freezing? They are on medicated starter feed.