Contains 50 grams IgG, USDA Vet-Bio to aid in the treatment of failure of passive transfer of immunity in newborn calves. Made from whole bovine colostrum to boost calf immunity and energy when maternal colostrum is limited or low quality. Provides easily absorbed IgG to help calves develop a strong immune system. Also provides colostral fat to help calves stay warm in extreme weather. Feed within the first 6 hours of life to maximize absorption.