A
horse that runs with a pacing
gait, the foreleg and hindleg of each side moving and striking the ground in unison. This swinging
gait is unbalanced and unnatural for most
breeds of horses.
Pacers are bred and trained for
harness racing. The most famous harness racing pacer of all time was
Dan Patch who set records for
harness racing in the first decade of the
20th century.