For successful breeding outcomes, timing is everything. The horse’s natural reproductive period coincides with the light-filled days of summer. As seasonal breeders, the naturally lengthening days of spring suppress melatonin and in turn stimulate reproductive hormones that maximise fertility for both mares and stallions.

The Caulfield program on Saturday produced a number of progressive winners and one to really catch the eye was So You Think gelding Sure, who made it two wins in as many starts when he strode to an easy victory.