![Good things come in three for progeny of Supreme Gem](/img/di/good-things-come-in-three-for-progeny-of-supreme-gem-1.jpg)
Good things come in three for progeny of Supreme Gem
The 2023 harness racing season might still be in its infancy, but Prebbleton horseman John McDermott and his bonny mare Supreme Gem (Christian Cullen) have made every post a winning one thus far.
In the span of eight days, three daughters of Supreme Gem have chalked up race wins at South Island meetings, giving McDermott and his wife Christine…