A sheepdog trial (also herding event, stock dog trial or simply dog trial) — is a competition or test for working abilities of herding breeds dogs. It is a type of dog sport that emerged in the second half of the 19th century in New Zealand and Great Britain, and by the end of the 20th century gained popularity in many countries of the world. In competition, dogs demonstrate basic herding management skills assessed by the judge. International and national cynological and sports organisations, cattle-breeders' societies are involved in organising these events. Usually competitions are held with sheep, sometimes other animals are used: ducks or cows.