notice DAZ on both Anton's pic of the (I think Lippizan) and Daio's pic of her black stallion that the forearm bone (the one coming out of his shoulder) is MUCH longer than the cannon bone (the one below the knee). It's much more evident on Anton's pic because the animal is out in the open. Also notice how the length of the forearm bone and the proportions of forearm/cannon bone affect the length of stride and reach (that's the front legs moving outward).