Im not smart enough to make the measurements, but I was wondering if any of Deisel's playmates can run with him, and what breeds they are? I know you probably don't get around whippets or greyhounds often, but I was just wondering how his speed matches up to the other breeds. I can't do this now, but when my pup was a bit younger he could play in the open with a few dogs that he had known since a few weeks old (not at all anymore) and none of them fully mature could keep up with him. They were a shepherd mix, another "pit bull", and a German Long Haired Pointer...all full grown. Im just curious...