What is the behavior called when a horse bites on some part of the feed manger or stall?

The behavior referred to when a horse bites on some part of the feed manger or stall is known as cribbing. This is a common stereotypic behavior observed in horses, where they grasp a solid object with their teeth and pull back while simultaneously swallowing air. Cribbing can result in wear on the horse's teeth and may lead to gastrointestinal issues, as it can also be associated with the horse attempting to relieve boredom or anxiety.

Understanding cribbing is crucial, as it indicates a horse's attempt to cope with stress or lack of stimulation in its environment. In contrast, other behaviors listed, such as weaving, stall walking, and teeth grinding, have different characteristics and serve to demonstrate other types of stress or discomfort in horses. For example, weaving involves shifting weight from side to side repetitively, stall walking is when a horse paces in its stall, and teeth grinding can often indicate pain or discomfort. Each behavior has distinct roots, but cribbing specifically relates to the biting action described in the question.