The show-bred version of the breed has been linked to 'rage syndrome', although the disorder is very rare. It is closely related to the Welsh Springer Spaniel and very closely to the English Cocker Spaniel; less than a century ago, springers and cockers would come from the same litter. The smaller 'cockers' hunted woodcock while the larger littermates were used to flush, or 'spring', game. In 1902, The Kennel Club recognized the English Springer Spaniel as a distinct breed. A field-bred dog and a show-bred dog appear to be different breeds but are registered together. The English Springer Spaniel weight ranges from 44 to 45 pounds. A healthy Springer Spaniel should eat about 1,353 calories per day.