Final answer:
An upright posture in horses is linked to increased concussion in the joints during movement, predisposing horses to bone chips due to the steep limb angles that cause more stress on the joints.
Step-by-step explanation:
An upright posture is associated with hard concussion or a pounding gait; it predisposes a horse to bone chips. This is because an upright posture often indicates that the limb angles are steeper than normal, leading to more concussive forces being transferred to the joints during movement.
This increased stress on the joints can lead to the development of bone chips and other orthopedic problems in horses.