I found a 20lb bag of sweet pdz powder in my shed. It’s probably 10 years old but has been stored in a dry place and looks fine. Since it’s a mineral I am assuming it does not go bad. I don’t want to use it in the coop on my poop boards cause it’s fine powder and would be dusty. I use deep litter hemp and granules zeolite on the boards. So my question is, could I dump it in my open air uncovered run and rake it into the wood chips? Would it help keep moisture, smell, flies away? Or should I just toss it? Hate to waste if it would be worth the trouble of raking it in.