Which dairy cattle breed produces the most milk?

• A. Guernsey
• B. Holstein
• C. Brown Swiss
• D. Jersey

Answer: (B)

Milk yield across dairy breeds is influenced by genetics and body size. Holstein cattle have been selected for very high milk production, with large-frame cows capable of converting substantial feed intake into a large volume of milk. This combination typically results in the highest total milk yield per lactation among common dairy breeds, even though their milk fat content is generally lower than some other breeds. The Jersey and Guernsey often produce milk with higher fat content, and Brown Swiss offer a good balance of volume and protein, but their total daily and yearly milk production is usually less than that of Holsteins. So, when the goal is maximal milk volume, the breed known for producing the most milk is the Holstein.