It all began during this summer's 4 Deserts Gobi March 2016, a 6-day foot race weaving through China's largest desert. Leonard was one of 101 human participants - but he soon found himself joined by a different sort of competitor.
A little homeless dog living near where the race commenced the first day had decided to get in on the action, trotting alongside the other runners for the first 22-mile stretch. Leonard had noticed the pup back at the runners' camp, though he could never have guessed she'd be in it for the long haul.
And, as it turns out, she was looking for a racing partner.