What are the six breeds of dairy cows and how much milk do they have?

The six main breeds of dairy cows are Holstein, Jersey, Guernsey, Ayrshire, Brown Swiss, and Milking Shorthorn. Holsteins are the most common and can produce around 22,000 to 23,000 pounds of milk per year. Jerseys are known for their high butterfat content and typically yield about 9,000 to 10,000 pounds annually. Other breeds like Guernsey and Brown Swiss produce similar amounts, generally ranging from 14,000 to 18,000 pounds per year.