My friend has tried to start to teach her dog to shake in the way it's done in this video: http://www.howcast.com/videos/509723-How-to-Teach-Your-Dog-to-Shake-Hands-Dog-Tricks but the dog is acting silly and she either stares at her or licks the hand. If she paws the hand she only does it few times. Is there another way to teach this trick? For example, she might sometimes touch the hand but she does it in sloppy way. If my friend puts her fist on the floor near the paw, her dog doesn't touch the fist but avoids it instead. How is dog teached to shake with both paws so that when you give your dog your left hand she/he will give you her/his right paw and vice versa?