It is noteworthy for producing one of the most varied numbers of pups in a litter among all dog breeds. 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. American Cocker Spaniels are smaller, with the males being on average between 14.25 and 15.5 inches (36.2 and 39.4 cm), and females again being smaller on average at between 13.5 and 14.5 inches (34 and 37 cm), both weighing approximately 11–13 kilograms (24–29 lb). In a 2004 UK Kennel Club survey, the most common causes of death were cancer (30%), old age (17%), cardiac (9%), and 'combinations' (7%).