Schleich Holstein Calf Black Holstein bulls and cows are the most popular breed of cattle in the world. They were first bred in the Netherlands and brought to America in 1857. These cattle are instantly recognizable by their black and white coat coloration, they are sort of the prototype of the domestic cattle. Today, black and white cattle are raised for their amazing milk production: The average cow produces 12000 liters of milk per year. They live to be three to four years old, but some have much longer life spans. Cattle have four stomachs. They eat a combination of grasses and hay when kept indoors, which is then regurgitated. The half-digested feed is pushed back into the mouth from the first stomach, where it is then chewed until it is in a state where it can pass through the other three stomachs. The cows then look like they are chewing gum..