You can put food grade DE into the feed to keep it dry and bug free, but I dont think I'd actually put Stall Dri into the feed, though if they ingest some, it's probably safe enough. PDZ is not made to dry up anything, just to absorb ammonia odor. I've used PDZ, but you have to use alot of it to work the way I like. It's cheaper than DE, which costs me $25/50#.