“…Mexico has one of the largest horse populations in the world (da Mota and Regitano, 2012) with a substantial number of mixed-breed horses used for agricultural, farming, transportation, tourism and patrolling (i.e. mounted police) purposes (Loroño-Pino et al, 2003;Velázquez-Beltrán et al, 2011;Cantú-Martínez et al, 2012;Sánchez-Casanova et al, 2014). However, a significant number of horses in Mexico are purebred, mainly promoted by four official horse breeding associations that manage the studbooks for breeds such as the Pura Raza Española, Lusitano, Azteca, Westphalian, Holsteiner, Dutch and Belgian warmbloods, Selle Français, Hanoverian, Thoroughbred, Quarter Horse and Arabian (CONARGEN, 2017;Domínguez-Viveros et al, 2014).…”