My first dog that I owned all by myself was an awesome mutt named KC.  She was super smart, extremely loyal, and always looked like a puppy!  People were always asking what kind of dog she was.  We had our best guesses but never really knew exactly what she was.  I came across this company called Canine Heritage the other day.  They actually can tell you your dogs breed composition from a simple DNA swab from your favorite mutts cheek.  I would have jumped on this in a heartbeat for KC!