My dog, Penny is very active. Even though, I knew this before I brought her home, I am often still surprised at how much energy she has and how she can keep moving and moving and moving! Her breed is a working breed and loves to run, play, and work. She is a cattle dog mix (Border Collie, Heeler, and Australian Shepherd). When Penny is at the dog park, she loves to run circles around other dogs, trying to get them to chase her. She loves it when a dog does start to chase her.