Much has been written about Vasco Nunez Balboa's use of highly trained attack dogs. Dogging was in fact a favorite sport of the conquistadors. These dogs were mostly mastiffs and wolfhounds, or mixtures of both. They moved in packs and were trained to kill, and they ate human flesh. Vasco had one dog in particular that he highly favored. It was called Leonsico. Leonscio was so vicious that it tore that head off of a Native American cacique (leader)in Panama.