Okay--I thought I read up pretty well on stuff....I mixed some raw oatmeal (pretty fine oats) and some regular bird seed in with the poultry feed that we bought at the co-op. The chicks have been loving it, but I just read something about not feeding raw oatmeal to chickens that don't have access to grit. What do you use for grit and do you supply it to chicks? I do have a bag of playground-type sand available. Should I be really concerned about this? What do you suggest if this is a big problem?