Motomco's Vitamin D3 bait, Agrid3 is the first and only rodenticide registered by the Environmental Protection Agency (EPA) and listed by the Organic Materials Review Institute (OMRI) for use in organic production. Its organic production label includes food processing, warehousing/storage and animal production, as well as use in and around agricultural buildings, such as swine, poultry, cattle, and dairy facilities. All-Weather Block is Mold and Moisture Resistant, Proven Bait Acceptance – Rodents Prefer to Gnaw on the Multiple Edges of Our Blocks, Can be Secured in a Bait Station, Agrid3 Bait Chunx are 1 oz