Video on White Line Disease in Horses

Updated May 9, 2024

In this video, farrier Danvers Child explains White Line Disease, a fungal infection of the white line (or lamina) on the bottom of the horse’s hoof. This condition causes a widening of the white line, or a separation of the hoof wall from the sole.

This separation is then invaded by bacteria and fungi, leading to infection that progresses up towards the coronary band which produces a white or gray powdery material. White Line Disease is usually first noticed by the farrier during a routine trimming because only severe cases actually cause lameness.