How should a shepherd use a crook to immobilize a sheep?

Using a crook to immobilize a sheep by placing it high on a back leg is an effective method. This technique allows the shepherd to gain control over the sheep's movement without causing harm or distress. By securing the leg, the shepherd can then safely perform tasks such as shearing, examining, or treating the animal. This method capitalizes on the anatomy of the sheep and its natural responses, as immobilizing a back leg can make it more difficult for the sheep to run or evade capture.

In contrast, placing the crook around the neck can be more dangerous, as it may cause choking or panic in the animal. Holding the crook near the tail doesn't provide effective control for immobilization, as it does not restrict movement properly. Lastly, using the crook to pull the sheep closer can lead to unnecessary stress and confusion for the animal, rather than providing stable control. Therefore, the most appropriate and effective method is to immobilize the sheep by securing a back leg with the crook.