After calving for the first time, a dairy cow will give milk for about ten months-or 305 days-followed by 60 days of rest, before it gives birth again. Farmers manage their herds so they have a consistent supply of milk for Thier market. read more
Among many variables, certain breeds produce more milk than others within a range of around 6,800 to 17,000 kg (15,000 to 37,500 lbs) of milk per year. [citation needed] The Holstein Friesian is the main breed of dairy cattle in Australia, and said to have the "world's highest" productivity, at 10000L of milk per year. read more