Table 2. Behavioral score during the novel object test

Behavioral score Description
5 Horse suddenly jumps away more than 2 meters from the novel object, typically followed by trotting, galloping, alertness, and possibly snorting; keeps far away from the novel. object despite handler encouragement.
4 Horse is alert and suddenly jumps away less than 2 meters from the novel object, typically followed by trotting, galloping, further alertness, and possibly snorting.
3 Horse escapes and exhibits vigilant behavior (elevated neck, head, and ears oriented toward the test stimulus), typically followed by trotting, galloping, alertness, and possibly snorting.
2 Horse escapes but is easily restrained.
1 Horse does not react to the novel object and approaches it without hesitation.