Meen Sadie. Sadie is a 6-years- old (which in dog years is about the time their mid-life crisis hits) German Shepard/Border Collie mix. Her owner found a way to relax her and tone her down by trying to teach her to play the piano. As you can see from the video, she is very very obedient and enjoys what she’s doing. Poor girl even gets embarrassed when she makes a mistake! Don’t worry, Sadie, it’s human to make mistakes!