It is actually very easy to teach a dog to do bye-bye. Place the dog's favorite food above the dog's head with your hands and keep raising it high. The dog will naturally stand up and stretch out its two front feet. This action is exactly the "bye-bye" action. posture. At this time, you can continue to hold the food to induce the dog to stand and stretch its front feet, and at the same time give the "bye" command. After doing it several times, reward the dog with food and pat the dog's head for praise. After training for a period of time, the food reward can be removed and the dog can only be petted to praise it. After forming a conditioned reflex, the dog will stand up and stretch out its front feet as soon as it hears the "Bye bye" command.