After completing Dr Kellon's NRCPlus Equine Nutrition course to brush up on my nutrition knowledge, I am now offering clients a diet analysis service. This involves analyising you horse's diet against NRC recommendations and creating a custom mineral supplement to correct any imbalances.
Improving dietary imbalances helps improve hoof quality, by clearing up sand cracks, reducing hoof wall separation and improving growth. See the photo below. The top half of the hoof is on a minerally balanced diet and the bottom half was grown prior to using the custom mineral mix.