Queen Elizabeth II has introduced a new breed of dog when she mated her beloved corgis with what breed?

Explanation

Queen Elizabeth II is the second-longest reigning monarch in the world. She is well-known for her love of animals in general, and dogs and horses in particular. She introduced a new breed of dog known as the "dorgi" when she mated one of her corgis with a dachshund named Pipkin which belonged to Princess Margaret.