An oral, chemical-free feed supplement to reduce fly problems and enhance coats. 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 30 Pound. Dimensions are 13.5 X 13 X 19.5 UPC Code = 748118622546