An animal between shafts wears harness breeching, which attaches forward to the shafts. These include breastplates, overgirths, cruppers, and, on pack saddles, breeching. An animal is often trained in harness with breeching before being hitched to a vehicle. On pack horses, saddle breeching alone is quite common. Some harnesses with breeching use this as an anchor instead of a crupper. These methods included pulling on the legs of the baby or using breeching hooks. However, sometimes a crupper is used in addition to breeching. Pack horse breeching may be supplemented with a crupper to provide additional stability. Wheelers may not need breeching in very light vehicles, or those with efficient brakes. Breeching may be omitted where the animal does not need to provide substantial braking. Breeching was the occasion when a small boy was first dressed in breeches or trousers.