The Red Lake Earth Diatomaceous Earth with Calcium Bentonite is OMRI-listed for use in organic production and is for use in feeds as an anticaking agent or pelleting aid for further manufacturing in feed. Red Lake Earth is environmentally friendly, completely safe, and does not contain any antibiotics or harmful chemicals. The Diatomaceous Earth you know and trust! It's safe for large and small animals including poultry, dairy, swine, cattle, equine, goats, sheep, bison, ratite (e.g. ostrich, emu), rodents, rabbits, dogs, etc. It comes in a 40 lb. bag.