Kerry cows at the Killarney National Park. The Kerry is believed to be one of the oldest breeds in Europe. The skull is very similar in formation to the ancient aurochs of the Stone Age (Bos primogenus) though smaller in size. The Kerry has the distinction of being the first breed developed primarily as a milk producer. While prehistoric man in Asia, North Africa and Europe was selecting and breeding cattle for draught and meat, the Celtic civilisation in Ireland was producing a breed of cattle for milk and dairy produce. The diet was based on milk and milk products; meat was rarely eaten.