I must note here that it has never been scientifically demonstrated that supplementation with any of the necessary building blocks for healthy hoof will increase hoof growth or its quality in horses which are receiving the required amounts of all of the essential components from adequate nutrition. Whether the nutritional requirements of your horse are adequate with respect to these essential components is another question. There is strong evidence that failure to meet the nutritional requirements with respect to protein and other essential components will have a negative effect on hoof growth. The mature horse's foot grows an average of 0.25-0.35 inches per month. This growth rate varies seasonally.
Growth is slowest when the weather is the hot or the cold.
The hoof is constructed to be a pliable structure and has elastic and displacing qualities that allow the foot to deform under force in an effort to allow it to withstand those forces. In addition, the physical movement that the hoof experiences while under load is one of the major ways that blood is pumped throughout the structures of the foot. Inappropriate foot care with respect to shoes and trimming can have a great influence on how well the foot deals with normal work. Many domesticated horses do not wear down their feet at a normal rate due to inactivity, which makes trimming necessary. If the feet are not kept appropriately trimmed, the wall length will become excessive and increase the forces displaced up the front of the wall when the horse is in motion.