Navicular disease is a common condition affecting the navicular bone in horses, located just behind the coffin bone in the hoof. It is characterized by inflammation and degeneration of the bone and surrounding structures, leading to pain and lameness. This condition often affects performance horses, particularly those involved in disciplines that require significant stress on the front limbs. Symptoms of navicular disease include a shortened stride, difficulty turning, and sensitivity to hoof pressure. Diagnosis typically involves a combination of veterinary examination, radiographs, and sometimes MRI to assess the extent of the damage. Treatment options may include rest, medication, and corrective shoeing to alleviate pain and improve mobility.