Indeed, it is one of the most common hoof diseases in the world. According to the American Association of Equine Practitioners (AAEP), approximately 10% of all horses are affected by white line disease. White line disease is also one of the most expensive foot problems to treat. Hoof care professionals often spend hours and hundreds of dollars per horse to treat the disease.
The seriousness of this disease depends on several factors. Most importantly, the severity of the initial attack determines how long it takes for the horse to become lame. If white line disease is mild, the horse is likely to be lame for no more than a few weeks or months. However, if the initial attack is severe, the horse may be lame for years.