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Holstein-Friesian, breed of large dairy cattle originating in northern Holland and Friesland. Its chief characteristics are its large size and black and white spotted markings, sharply defined rather than blended. These cattle are believed to have been selected for dairy qualities for about 2,000 years.
We named her Ultramarine and called her Blue. The blue roan color in cattle is usually the result of breeding a black cow (or bull) to a white bull (or cow) and results in a wide variety of blue coloration depending on the ratio of black to white hairs.To get a solid blue calf you want to mate a solid colored (not spotted) animals.oaning is basically the intermixing of two different colored hairs-black and white make a blue roan while red and white make a red roan. In cattle with spots the roan only shows up in the area where the solid color would be-thus getting a totally blue cow is relatively unusual.