Cocker Spaniels (the American version) were derived from English Cocker Spaniels after they found their way to the United States in the late 1800s. Americans preferred to breed a smaller sized Spaniel that would be ideal to hunt quail in various other small birds. Although the exact practice and decision to which the American version was created is not entirely known, we do know that the first true American Cocker Spaniel was recorded to be born sometime in the 1880s and his name was the dog Obo 2nd.