Standing and walking on the hind legs are tricks that put an abnormal strain upon the muscles of the back and hind legs and most dogs require considerable practice before they gain sufficient control of those muscles to balance themselves in this unnatural position.
Before you rush into teaching this trick, bear in mind that not all dogs can do this trick, especially the big dogs such as St. Bernard or Great Dane as it is almost physically impossible for them to perform such trick. Sorry. This trick is not for you - Big dog owners!
A dog should first be taught to sit up and after he will do this well, hold a small piece of treat just above his nose and say