Acero is son of Calabria and Troll . Very strong head, big bone shape and expression makes him ultimate Spanish presa. He takes it after his father Troll de las Tinieblas. Troll was a perfect hunter with strong structure typically for descendants of Chato de los Cuadrejones . Mother of Acero Calabria de las Tinieblas is synonym of stamina, power and drive. She is daughter of one of the most famous catchers in the breed – legendary Curro de Tameran. Curro wasn’t perfect in conformation of Alano but was perfect as working dog, catching dog and dog in generally. Calabria’s size and expression are adequate to her ultimate character. In some of Curro’s descendants were visible characteristic of his magnificent mother –Tizona . Unfortunately often her transmission was covered by unwanted influence of presa and boxer. Acero represents typically presa characteristic and this kind of spanich catching dogs not belong to our breeding program of Alano.