may range from a half-point to five points for each infraction, and in some cases a significant error may result in a zero score for the run. Certain misbehaviors may incur penalty points beyond a poor score for a given maneuver. Significant errors, such as going off pattern or using illegal equipment, will result in a "zero score". Under NRHA rules, horses with a zero score cannot earn a placing or advance in a multi-go event, though they may be eligible for a payout if there is a small number of horses in the entire competition. Some sanctioning organizations other than NRHA may allow a horse in a small class to earn an award for last place. Major mistakes, such as failure to present the horse for an equipment check, a rider with illegal equipment or one who abuses the animal in specified ways, result in a "no score," which prevents the horse from earning any award or payout, even if it is the only horse in the class. The horse Reining may be performed by any horse, but the Stock horse breeds, particularly the American Quarter Horse, dominate the field. The reining horse must be agile, quick, and very responsive to the rider's commands. Powerful hindquarters are required to hold position in a sliding stop or a rollback, excellent coordination is required for proper spins and flying lead changes. Correct leg conformation is essential, as the limbs and joints are often under considerable stress in competition. The horse must also have an excellent temperament to perform with both speed and precision. Equipment and attire Riders must use a western saddle. Spurs are allowed, but whips are not. Bridles are western-styled, without a noseband or cavesson. The bosal style hackamore is also allowed on "junior" horses. There are very strict rules about what types of bits and bosals are legal. For protection, horses usually wear splint boots on the cannons of their lower front legs as well as skid boots on their hind fetlocks. Bell boots, which wrap around the pastern and protect the hoof and coronary band, are also usually seen, sometimes only on the front feet, other times on all four feet. Polo wraps are also another form of protection that is used, this helps give support to the tendons and ligaments, and prevents bruising and irritation. These can be used on all four legs but if wrapped