Candybar was an old horse in 1983, when she was on the Sorensen farm, mostly put out to pasture, but occasionally ridden at a walk. Judy Niven had just been introduced to her and was happily riding around until she hears a "thud". Judy quickly rides over to where Chet Sorensen had been trapped underneath the corn planter, and uses Candybar to pull him out while she lifts the planter. TNG3.
Later, Candybar pulls a sleigh at Christmas time, and she gives a ride to a partially paralyzed girl named Charlotte.TNG19