Harris Food Grade Diatomaceous Earth Food Grade feed supplement powder is a natural product, composed of 100% ground freshwater diatomaceous earth, mined in Nevada, packaged in Georgia. The 8-ounce bottle /applicator is the dispenser device used to easily apply the powder. Although Harris Food Grade Diatomaceous Earth is not intended for human consumption, there are directions for mixing into animal feed. Use for horses, chickens, cats, dogs, cattle and birds. Mix up to 2% of total weight of food ration. Always follow label instructions and keep out of reach of children.