Je was op zoek naar: corneador (Spaans - Engels)

pero si se sabía que el buey era corneador en el pasado y su dueño no lo había guardado, pagará buey por buey; y el buey muerto será suyo
or if it be known that the ox hath used to push in time past, and his owner hath not kept him in; he shall surely pay ox for ox; and the dead shall be his own.

si el buey era corneador en el pasado y a su dueño se le había advertido, pero no lo había guardado, y mata a un hombre o a una mujer, el buey morirá apedreado; y también morirá el dueño
but if the ox were wont to push with his horn in time past, and it hath been testified to his owner, and he hath not kept him in, but that he hath killed a man or a woman; the ox shall be stoned, and his owner also shall be put to death.

a la luz de estas cifras - a las que se podría añadir que la ganadería ostenta el record de ser la máxima corneadora en el tramo callejón/plaza -, no es de extrañar que jandilla sea una de las ganaderías más temidas por los corredores habituales.
in the light of these figures - to which we might add that this bull-breed has the record for the most gorings on the final stretch leading into the bullring - it is no surprise that the jandilla bulls are among the most feared by the habitual runners in the running of the bulls.