Canker is an infection of the horn producing tissues of the foot. The infection begins in the frog. It can affect the sole, hoof wall, and bars of the foot as well. Although it most commonly affects draft breeds, any breed of horse can develop canker.

Canker is an infection of the horn producing tissues of the foot. The infection begins in the frog. It can affect the sole, hoof wall, and bars of the foot as well. Although it most commonly affects draft breeds, any breed of horse can develop canker.