, from 3-5 seconds to more than 5 minutes.
How to teach him to shake hands
On the basis of "sitting down", give the password of "shaking hands", reach out and hold one front foot of the dog, and give the password of "changing". Put down the front foot you hold and change to the other front foot. After successfully completing the action, you will be rewarded. After repeated training, you can combine gestures and cancel the reward to extend the action.