This is an ox. an ox is a bull of at least four years of age that has been trained to work, i.e. plow a field or pull a cart or wagon. The owner I just met yesterday and spent most of the day with. She is a real neat lady. she owns "Old World Oxen" living history co. She travels around presenting a 1800's historically-correct pioneer camps with live oxen under yoke, covered wagon, tools and artifacts.