A hering dog is a type of pastoral dog that either has been trained in herding or belongs to a breed developed for herding. In Australia and New Zealand they are known as working dogs irrespective of their breeding. Some herding breeds work well with any kinds of animals; others have been bred for generations to work with specific kinds of animals and have developed physical characteristics or styles of working that enhance their ability to handle these animals. Commonly mustered animals include cattle, sheep, goats and reindeer, although it is not unusual for poultry to be handled by dogs.