In Europe, the breed is used for milk in the north, and meat in the south. Since 1945, European national development has led to cattle breeding and dairy products becoming increasingly regionalized. More than 80% of dairy production is north of a line joining Bordeaux and Venice, which also has more than 60% of the total cattle. This change led to the need for specialized animals for dairy (and beef) production. Until this time, milk and beef had been produced from dual-purpose animals. The breeds, national derivatives of the Dutch Friesian, had become very different animals from those developed by breeders in the United States, who used Holsteins only for dairy production.