MinLic® IGR supplement is specially formulated to enrich the diet  with essential minerals and sufficient (S)-Methoprene insect growth regulator to prevent the emergence of adult horn flies from manure of treated cattle without the added cost of supplemental protein. This unique supplement is second  to none when compared to other low moisture blocks. This block is the product of a state-of-the art patented process that provides a unique 24-hour feeding system. MinLic® IGRis an exceptionally dense block that will give you the most for your money.