Teaching dogs to say goodbye is actually very easy. Place the dog's favorite food on top of the dog's head with your hands and keep raising it, the dog will naturally stand up and stretch out The two front feet, this action is the bye bye posture. At this time, you can continue to hold the food to induce the dog to stand and stretch its front feet, while issuing the bye bye password. After doing this several times, reward the dog with food and rub the dog's head for praise. After training for a period of time, the food reward can be cancelled, and only the pet dog praises it. After the conditioned reflex is formed, the dog will stand up and stretch out its front feet as soon as it hears the bye bye password.