The Horse is the seventh of all zodiac animals. According to one myth, the Jade Emperor said the order would be decided by the order in which they arrived to his party. Horse had to pass a cemetery on his way, but he was too scared. He hesitated for the longest time because running past it with his eyes closed. After he overcame that obstacle, he went at full speed and managed to arrive seventh.
Horses are free spirits who need space to be themselves.
Comment: then they become a bloody nuisance