Racing stables are generally situated within convenient distance of training-grounds, as Newmarket Heath, the South Downs, etc, and are managed by trainers to whom are committed the horses of numerous owners. The separate loose-box is the universal system, and for a variety of reasons, the chief of which is the desirability of keeping apart entire horses, and the prevention of accidents to animals of great value, such as might occur in stables where, by breaking loose, the sexes could commingle, or vicious mares damage one another.