Our Suzie cue like a rocket she only knee high but she can clear the living room couch like it wasn't even there. Full speed just about all the time. She a short haired Boarder collie mix of some sort.
Our Suzie Q came from one of the Albuquerque shelters. SHE was the puppy that was returned twice. They thought she was nuts. Which I considered completely normal behavor .We get along fine.