They are more easily managed and are better riding animals owing to the lack of interest in fighting or in females. Usually castrated between 5th and 8th year, but for riding purposes animal needs to comply with basic body requirements. Unfortunately a good animal is identified it cannot be breed once it is castrated. Females have the obvious extra advantage of breeding use, and are better racers. But, naturally they cause problems when on heat.
Bulls are often problematic and are normally kept for breeding purposes.
But although able to race, can cause problems when females are around. A mature riding bull should display the signs of masculine strength, boldness and symmetry. There are two categories of riding animal. One is intended for short sharp bursts of speeds over distances not in excess of 10kms. The other is intended for endurance over longer distances.