I think a dobermann is the best trained I've encountered. This dog was a robot. Its was kind of off-putting to watch him work. I am around so many dogs though its hard to remember who's impressed me. Autumn is definately one of the smartest dogs I know (toller). She catches on very quickly to new concepts and she knows a lot of words and commands. But, she also knows what she can get away with and likes to cut corners when she can.