The Golden Retriever is a medium-large gun dog that was bred to retrieve shot waterfowl, such as ducks and upland game birds, during hunting and shooting parties. The name 'retriever' refers to the breed's ability to retrieve shot game undamaged due to their soft mouth. The Golden Retriever was originally bred in Scotland in the mid-19th century. The breed is a prominent participant in conformation shows for purebred dogs. The Golden Retriever is popular as a disability assistance dog, such as being a guide dog for the blind and a hearing dog for the deaf. In addition, they are trained to be a hunting dog, a detection dog, and a search and rescue participant. British Golden Retrievers can have a coat colour of any shade of gold or cream; red or mahogany are not permitted. Originally, cream was an unacceptable colour in the UK standard, but the standard was revised in 1936 to include cream. Originally, cream was an unacceptable colour in the UK standard, but the standard was revised in 1936 to include cream.