[Pure Food Grade Diatomaceous Earth]
If you don't know about fossil shell flour and what it can do for your stock, check out this website..
http://perma-guard.com/fossilshell.html
I give this to all our animal, both big and small and what an improvement in coat, temperment, and digestive capabilities. What's more, I now save on those regular store bought wormers too! We also use it in and around our tack room for a bug free environment. Long Live... FOSSIL SHELL FLOUR!!!
Going to make some home made horse treats using the flour! We get this at our local feed store too! The ranch loves this stuff!!!