What is the basic function of the bit in a horse's mouth?

The basic function of the bit in a horse's mouth is to facilitate communication between the rider and the horse. When a rider uses the reins attached to the bit, subtle pressures and signals can be conveyed, allowing the rider to guide and control the horse's movements. The bit interacts with the horse's mouth, providing feedback that helps the rider instruct the horse on what actions to take, such as turning or stopping. This communication is vital for the partnership between the rider and the horse, enhancing safety and performance during riding activities.

While some might think a bit’s purpose could be for speed control or to keep the horse calm, these aspects stem from the effective communication it allows. Proper use of the bit can indeed influence a horse's speed and help maintain composure under the rider's guidance, but its primary role is centered on the connection and interaction it establishes between horse and rider.