Dairy Products
Jewish law requires that in the production of dairy products, a mashgiach or Jewish supervisor must be present from the beginning of the milking to the end of processing to ensure that only milk from kosher animals is used. Where supervised milk is unavailable, some Rabbinic authorities permit government inspection as sufficient assurance (although not in all countries). All agree, however, that actual supervision is preferable. Milk with such supervision is known as chalav Yisrael.