I remember those fearless days. Gracie Ruth seemed to never wear down. Boo, who has the patience of Job, would play with her for as long as he could. Then he'd just jump on the couch or chair to get some rest. But if he hung a paw over the edge G would attack it. Boo would just grumble and move away from the edge. It was great that he had a place to retreat from her and rest when he needed to.
I also remember watching a lot less tv at that time. It was entirely too fun to watch her running and playing. Enjoy it, they don't stay puppies forever.