Enemy from the Banjo-Kazooie series.
Although they appear to be alive, they have a small metal wind-up crank on their backs. They, along with the worlds in which they reside, were created by L.O.G.. In Nutty Acres, if a bull is taken and dropped in the volcano, the player will earn the achievement, BBQ Beef.
There are only 3 Bulls in the game, one in Mumbo's Mountain, one in Click Clock Wood and one Gruntilda's Lair (outside CCW world). A bull serves no purpose but to try to hurt you. It will chase you, but will not go far from where it normally strolls. You can hurt them, but not kill them. After three hits the Bull will go unconscious and wake up after little amount of time. If Golden Feathers are used against a bull, it'll go unconscious immediately.