American

The American Cocker Spaniel is a sporting dog. It is a spaniel type dog that is closely related to the English Cocker Spaniel; the two breeds diverged during the 20th century due to differing breed standards in America and the UK. The American Cocker is smaller from its counter cousin the English Cocker Spaniel weighing around 20-30 pounds.

English

The English Cocker Spaniel is a breed of gun dog. The English Cocker Spaniel is an active, good-natured, sporting dog standing well up at the withers and compactly built. There are “field” or “working” cockers and “show” cockers. The English Cocker are much larger with square heads.