Nana the Border Collie, trained only with positive reinforcement and a
clicker, can perform an astounding number of tricks.  And she's cute,
too.  This video, posted by NanaBorderCollie on March 25, 2011 displays only a portion of the acts this little dog can do:

To see more of Nana's tricks and to learn more about clicker training go to Clicker Training with Nana and Kaiser.

More cool animal videos can be found here!