The Welsh Corgi is a small type of herding dog that originated in Wales. Two distinct breeds are recognized: the Pembroke Welsh Corgi and the Cardigan Welsh corgi, with the Pembroke being the more common. The differences between the two breeds include bone structure, body length, and size.

Corgis are herding dogs, and perform their duties by nipping at the heels; the dog's low stature allows it to avoid being kicked in the process. As herding dogs, corgis work livestock differently than other breeds. Instead of gathering the cattle the way a collie would, by running around the livestock, corgis drive the herd forward by nipping at their heels and working them from behind in semicircles.

Seldom giving ground, if an animal should turn and charge, the corgi will bite its nose, causing it to turn and rejoin the herd. Although they specialize in herding cattle, corgis are also used to herd sheep and Welsh ponies. They are also one of the few breeds able to herd geese, and they also guarded children.

Corgis are very active and energetic. They have a strong desire to please and should receive both physical and mental exercise regularly. They should be socialized early on because they tend to be shy and cautious with strangers and other dogs. They have a tendency to be very vocal, and for this reason make good alarm dogs. They are typically good with children, but due to their herding behavior, may nip at their heels during play.