Can you tie up the leading sheep when grazing up the hill?

When herding sheep, establish a password to command the sheep, so that the sheep can understand the shepherd's fixed password. First, choose a password that is easy to distinguish, short, loud and clear, so that conditioned reflex can be easily established. Secondly, when choosing a password, we should pay attention to the language and fixed gestures, and don't change them at will, otherwise the command password will be chaotic and the conditioned reflex will be difficult to establish. For example, let the lying sheep stand and establish a sign code. The sign code is to train the sheep to act according to the herdsmen's intentions, mainly to train individual naughty sheep. If some sheep often steal their favorite seedlings and beans while herders are not paying attention, and some sheep like to graze independently in the distance outside the group, they should be driven back to the group.