The Cardigan Welsh corgi is one of two different varieties of livestock-herding dog breeds known as Welsh corgis, with the other being the Pembroke Welsh corgi. It is one of the oldest breeds of the British Isles. Cardigan Welsh corgis are known to be an extremely loyal and trainable dog breed, naturally attuned to herding many different animals, from poultry and waterfowl to large livestock such as sheep and cattle. They are also versatile and can live in a variety of settings.

A herding dog, also known as a stock dog or working dog, is a type of dog that either has been trained in herding livestock or belongs to one of the breeds that were developed for herding. A dog specifically trained to herd sheep is known as a sheep dog or shepherd dog.