The German label Ohne Gentechnik, without genetic engineering, rests on rules added in 2008 to a national law. On milk, meat and eggs it certifies how the animals were fed. Animals kept for milk must have been fed without genetically modified feed for at least three months, pigs for at least four months, laying hens for at least six weeks.
Milk, meat, eggs and other animal foods need no marking, even when the animals were given genetically modified feed.