I thought I'd give my 3-week-old chicks a treat and put some sand (mixed with a bit of DE) in their brooder and all they seem to do with it is eat it. Yuck. I thought I saw one of my chicks trying to give herself a sand bath in the pine bedding crumbs, which is why I put the sand in there to begin with. So, will it hurt them to eat the sand? I know it's natural for them to take in grit, but a tummy full of it seems a little excessive. Is it a waste to put it in there, or will they eventually get the hang of it?