The horse’s foot looks simple: a nice, round, smooth hoof on the outside, but in reality, it is a complex arrangement of bone, soft tissue, ligament, tendon, and hoof. It is precisely this toughness — the hardness of the hoof wall and major tendons — that complicates and compounds problems. When internal problems develop there is no give in these structures, no room for swelling within a hoof wall that is rigid with keratin, or for damaged tendons that were pushed beyond their amazing but rigid capacity.