The Harrier is a medium-sized  dog breed of the  hound class, . The Harrier requires daily exercise, such as long vigorous walks or runs. Allowing them to play in open space (so long as it is enclosed and safe) makes exercise fun and easy. Without appropriate exercise, the Harrier can become hyperactive, overweight and/or destructive. While this dog was bred to run and work all day long and cannot be satisfied by a completely sedentary lifestyle, they adapt very well to the average home.