UltraCruz Livestock Selenium Supplement for Cattle, Goats, Sheep and Pigs is a supplement for cattle, bison, goats, llamas, and alpacas designed to supply livestock with a source of organic Selenium. Selenium is an important trace mineral to promote optimal growth such as muscle development and reproductive health. Selenium is a beneficial nutrient to help reduce of health disorders. Naturally, selenium can be found in soil and various plant species. Grazing animals in areas with low Selenium levels in the soil can be put at risk for Selenium deficiency. Selenium deficiency varies upon region and environment. Developed and manufactured in the USA with globally-sourced ingredients by Santa Cruz Animal Health