Twitch (device)

A twitch is a device that is used to restrain horses during various stressful situations, such as veterinary treatment.

Another design, sometimes called a "humane" twitch, is a plier-like clamp that squeezes the lip with motion akin to that seen in a nutcracker.

[1] The twitch is considered a humane method of restraint and is commonly used by horsemen and veterinarians to keep an animal still and quiet.

It may cause permanent damage and behavioral issues if it is used--even correctly--such as a head-shy horse when used on the ear.

Additionally, if a twitch is left on for an extended period of time, it can cause permanent damage.