I came across this video.
http://www.youtube.com/watch?v=ZZMvUaYMtjE I remember seeing it several years back and it made me laugh then.
Animals have this ability to make you feel happy! They have a wonderful energy about them. We teach a
dog tricks 
to amuse us. However it is a very good training for the animal and helps the dog use his own intelligence. It is the best way of forming a bond between yourself and the animal concerned.
Watch and enjoy,again and again!