Table 3.

Ethogram of recorded behavior.

Behavioral Category (Freq)	Description
Gait change	The horse makes an undesired gait change, e.g., from canter to trot during the 1 min canter sequence, or from walk to trot during the 1 min walk sequence
Other undesired body movements	Bucking, kicking
Head movements	Head tossing, shaking or raising (i.e., movements of the head away from the usual head-and-neck position)
Tail movements	Lateral, dorsoventral or circular motion of the tail that interrupts the rhythmical waving motion of the tail corresponding to the gait
Open mouth	Mouth clearly opened; lower or upper teeth are visible