I had a fantastic mini dachshund as a kid named Hans. He had a great temperament, plenty of energy, and was up for anything. I've often thought about eventually getting another, but several members of my family have since had some that were weird, neurotic, fearful, and nippy. Has that become normal for the breed or did they just get "off" dogs? What has been your experience with mini dachshunds? Can they do agility or is it too dangerous for their backs?