What type of restraint device keeps a horse’s attention by focusing on its nose?

The chain shank is designed to keep a horse's attention by applying pressure to the nose when the horse pulls away or resists, capturing its focus and helping to guide its behavior. This device typically consists of a length of strong chain attached to a lead rope, allowing the handler to exert control while also providing a means of communication with the horse. It is particularly effective because horses are very sensitive to pressure on their nose, which leads them to be more compliant when this type of restraint is used.

The other options serve different purposes. Cross ties are used to secure the horse to prevent it from moving laterally; a stock is a confined space that restricts movement, often used for safety during procedures; and a lip twitch applies pressure to the lip to distract or calm the horse, but it does not focus the horse's attention in the same way that a chain shank does through its application on the nose. Each device has its own specific function and is not interchangeable with a chain shank in terms of attention and focus management.