Castrated male cattle.

A castrated male is called a steer in the United States, and older steers are often called bullocks in other parts of the world; although in North America this term refers to a young bull.

Piker bullocks are micky bulls that were caught, castrated and then later lost. In Australia, the term “Japanese ox” is used for grain fed steers in the weight range of 500 to 650 kg that are destined for the Japanese meat trade. In North America, draft cattle under four years old are called working steers. Improper or late castration on a bull results in it becoming a coarse steer known as a stag in Australia, Canada and New Zealand. In some countries an incompletely castrated male is known also as a rig.