Listen to a recent interview on Radio New Zealand's Country Life programme.
http://www.radionz.co.nz/national/programmes/countrylife/audio/2598727/belted-galloways
"Linda van Eyk breeds belted galloway cattle at Pirongia in Waikato. In the US, the striking cows are sometimes called Oreos - that's because their coats resemble the Oreo cookie - which has creamy icing sandwiched between two darkly coloured chocolate biscuits."