Ark Naturals Company Manna Pro Colostro-Fix Newborn Calf Supplement, 1 lb Colostrum-Fix is a nutritional supplement to be fed to dairy and beef calves for the first 24 hours of life It contains two sources of globulin protein for optimal performance (50g per dose) Colostrum-Fix is enriched with essential vitamins and minerals to offer complete nutrition to newborn calves