An oral, chemical-free feed supplement to reduce fly problems and enhance coat. Repellency is created from the inside out with use of brewers yeast, thiamine monohydrate and garlic. With diatomaceous earth that passes through the manure it naturally interrupts the fly reproduction cycle. For horses, cattle, sheep and goats. Size is 2 Pound. Dimensions are 4.5 X 4.5 X 7 Ground Dried Grape Pomice, Distiller Grains, Diatomaceous Earth, Garlic Powder, Brewer s Yeast, Mechanically Extracted Soybean Meal And Thiamine Monohydrate. UPC Code = 748118610017