All the runners had taken their position at the blocks by the time Joey had trotted up to the side of the tracks. Shi hadn't noticed until now that the hard rubbery surface of the track had been replaced with densely-packed earth, covered in grass. The tracks had been painted on like the stripes of a football-field.
'That makes sense' Shi thought 'Hooves are a little more delicate.' The newly-minted horse-herm looked down at hir own, and smiled pleased at the sight of slender, shining shoes tacked onto hirs.
Joey was startled out of hir reverie of looking at hirself when the start of the race was given; a softer bang than the regular starting shot, but then again, all the runners had more sensitive ears.
While the runners pounded off, shi mmed softly and images of both 'bouncing' areas on the runners came to mind. About halfway through the track, Joey began to grin slyly.
Starting with Sara, the runners began to change. Shi was the first to change, to give hir an advantage over the rest just long enough. Just for a few seconds, Saras image began to shimmer in the air like shi was obscured by a sudden heatwave. When shi emerged from the other side, four powerful Arabian hooves hammered into the soil and catapulted hir forwards.
Slowly, after a sufficient head-start had been gotten, all the other runners began to shimmer and change... All the horsemorphs across the field had become equine-taurs. Like a centaur, only their humanoid halves matched their horses part like they had been anthropomorphic.
What kept Joeys eyes glued to the track-team, however, wasn't quite the mass of racing bodies, or the fact that Sara was easily winning. All the taurs were still hermaphrodite. Their flagging tails all showed their thicker passage leading up their rump, and directly underneath it, a swinging set of stallions balls and a sheath.
In fact, left and right of their sheathes, each herm equitaur had also developed a dark set of mares teats -these would swell up into horse-udders if they ever got an equitaur foal.
Joey was starting to feel a little bit of a breeze between hir own new hindlegs, dropping lewdly when shi started and snorted loudly at the feeling of a gentle slap on hir rump.
"Hey now Joey, better calm down before you become the five-legged beast... How would Sara react if shi saw you respond to hir victory with a big hardon?" It was the familiar voice of Coach Lorna, and something about it, something in the way the larger Clydesdale equitaur sidled up to hir, was putting a break on the rather male arousal Joey was beginning to feel.