>>42493332
This is the disorder the mare Sugar had.

>Founder occurs due to the lack of blood flow in the laminae which produces inflammation in the hoof. As time goes by, the cells of the laminae are damaged due to the lack of oxygen and nutrients that are found in the blood. If the problem is not treated in the early stages of founder, the laminae will start to die and cause more problems along with pain. When the laminae die, the coffin bone can no longer support the weight of the horse. Sometimes the coffin bone can protrude through the sole, resulting in a possible irreversible case of lameness and excruciating pain.
Sugar would spent 80-90% of the time laying down because it hurt so much for her to stand.