Table 1.

Type (oral/motor), name and description of stereotypic behaviours observed

Type	Name	Description
Oral	Cribbing	The horse grasps a fixed object with its incisors, pulls back and draws air into its oesophagus while emitting a characteristic pharyngeal grunt.
	Lip play	The horse moves its upper lip up and down without making contact with an object, or the horse smacks its lips together.
	Tongue play	The horse sticks out its tongue and twists it in the air.
	Lip or teeth rubbing	The horse rubs its upper lip or its upper teeth repetitively against the box wall.
	Repetitive licking/biting	The horse licks or bites the box walls, box grids or external part of the feeding trough.
Motor	Head shaking and nodding	The horse bobs its head repeatedly up and down or tosses its head in recurrent and sudden bouts.
	Weaving	The horse sways laterally, moving its head, neck, forequarters and sometimes hindquarters.
	Box walking	The horse paces a fixed route around the stall.
	Door kicking	The horse kicks the door of the box repeatedly with its forelegs.

Adapted from [3],[5],[24],[26]].