My peeps will be here tomorow, so I was getting the brooder ready. I opened the brown paper bag of feed that I got from me feed store, and found starter crumbs instead of mash!! So I figured I'd run it through the food processer. It wont grind up 100% I still have a few crumbs left. Should I try to add some grit to the mixture? I'll I have is some some sandbox sand, if I need grit could I use that? I cant make it back to the feed store till next week.