The Belted Galloway is a rare beef breed of cattle originating from Galloway in South West Scotland, adapted to living on the poor upland pastures and windswept moorlands of the region. The exact origin of the breed is unclear although it is often surmised that the white belt that distinguishes these cattle from the native black Galloway cattle may be as a result of cross breeding with Dutch Lakenvelder belted cattle. Belted Galloways are primarily raised for their quality marbled beef, although they are sometimes milked and purchased to adorn pastures due to their striking appearance. In the US these cows are often informally known as "Oreo cows" after the Oreo cookie.
I was in Napa Valley this summer, and we came across these "oreo" cows. They are black on both ends, and white in the middle. Strange. I had never heard of such an animal, but I did find the following on wikipedia: