I need to know if play sand is ok for chicks. I live in WV and we do not have sand. However, my DD has a sandbox she no longer uses and I would like to know if it is ok to introduce my chicks to the play sand. Also, can they use it for grit? I will be heading out in an hour to go to the doc and will try to go to TSC then but in case I don't make it, I really need to know about using it for grit. Thank you for your help!!