For use as an anti-caking agent to be mixed into animal feed. Natural Product – Composed of 4lbs of 100% ground freshwater diatomaceous earth with absolutely no additives or fillers. OMRI Listed – Listed with the Organic Minerals Research Institute, a non-profit organization that reviews products against organic standards. Powder Duster Included – Powder duster in the bag for easy and efficient application of diatomaceous earth on animal feed Supports a Great Cause – Harris donates 10% of profits to support the local Etowah Valley Humane Society. Made in the USA Mined in Nevada and packaged in Georgia.