Holstein Cow

Holsteins are a breed of dairy cattle that originated in the Dutch provinces of North Holland and Friesland, and Schleswig-Holstein in Northern Germany. They are known as the world's highest-producing dairy animals. 
Dutch and German breeders developed the breed with the goal of producing animals that could most use grass, the area's most abundant resource, as their food. Over the centuries, the result was a high-producing, black-and-white dairy cow.
Breed characteristics
Holsteins have markings, usually black and white or red and white in colour, typically piebald patterns. On rare occasions, some have both black and red colouring with white. Red factor causes this unique colouring. 'Blue' is also a known colour. This colour is produced by white hairs mixed with the black hairs giving the cow a bluish tint. This colouring is also known as 'blue roan' in some farm circles. They are famed for their high dairy production,
A healthy calf weighs 40 to 50 kg (75–110 lb) or more at birth. A mature Holstein cow typically weighs 680–770 kg (1500–1700 lb), and stands 145–165 cm (58–65 in) tall. Holstein heifers should be bred by 11 to 14 months of age, when they weigh 317–340 kg (700–750 lb) or 55% of adult weight.