Oxen (singular ox) are cattle trained as draft animals. Often they are adult, castrated males. In New England and Maritime Canada, the term oxen refers to trained steers at least four years of age. Prior to age four they are referred to as handy steers. Oxen are used for plowing, transport, hauling cargo, threshing grain by trampling, powering machines for grinding grain, irrigation or other purposes, and drawing carts and wagons. Oxen were commonly used to skid logs in forests, and sometimes still are, in low-impact select-cut logging. Oxen are most often used in teams of two, paired, for light work such as carting. In the past, teams might have been larger, with some teams exceeding twenty animals when used for logging.
In order to become oxen, the cattle must learn to respond appropriately to the teamster's (ox driver's) signals. These signals are given by verbal command, body language, and the use of a goad stick or whip. In preindustrial times, many teamsters were known for their voices and language. In North America, the most common verbal commands are (1) get up (go), (2) whoa (stop), (3) back up, (4) gee (turn to the right) and (5) haw (turn to the left). In the New England tradition, oxen must be painstakingly trained from a young age. Their teamster must make or buy as many as a dozen yokes of different sizes as the animals grow.