Cutting your toenail too short or rounding the edge of the nail can cause it to grow into the skin. Wearing shoes or socks that don't fit well can also cause an ingrown toenail. If your shoes are too tight, they might press the nail into the toe and cause it to grow into the skin. You can get an ingrown toenail if you hurt your toe, such as stubbing it. This can cause the nail to grow inward.
However, jockeys tend to be shorter than normal to meet the weight guidelines. The average height for a jockey is between 4 feet 10 inches and 5 feet 6 inches.
Two racing breeds are generally taller than the typical horse, although plenty of them are average size. The thoroughbred grows to an average height of 63.78 inches, or about 16 hands, with a range of 62 to 68 inches or more. The standardbred, used for harness racing, averages about 63 inches tall, with a range of 60 to 66 inches or more.