Turnover is enhanced, in the main, by shortening the phalangeal lever. The lever is shortened, primarily, by cutting off as much toe as possible. Finally, and most important from the standpoint of enhanced turnover, the shoe must be set under so that an imaginary line from the front of the fetlock, bisecting the toe, to the ground, is as short as possible. By setting the shoe under, turnover is enhanced, and pressure on the DDFT is reduced as a direct result. The easiest method of protecting the rear third of the foot is the use of a bar shoe.
Upright horses seem to respond better to the more circular style of egg bars or straight bars.
The truth of the matter is that any horse that needs bar shoes, can't run with out them. The aforementioned methods of farriery may be used individually or in combination. Navicular problems range in severity from a slight bruise to the navicular bursa to a fractured navicular bone. Navicular Syndrome is no longer the Kiss of Death it once was.