The Patterdale Terrier is a breed of dog descended from the Northern terrier breeds of the early 18th century. Patterdale Terrier puppies tend to be bold and confident beyond their capabilities. The Patterdale is known as a working terrier, rather than a show dog. Typical of terriers, whose work requires high energy and a strong drive to pursue prey, Patterdales are very energetic and can be difficult to socialize. Though also kept as pets, due to being bred for high-intensity work, they may tend towards being too energetic for a sedentary household life.