Tiger keepers in a northeastern province in China have found a novel way to keep their cats in shape over the winter — a cat and mouse game, but the mouse in this instance is the keeper’s vehicle, reports China’s Xinhua news agency. The staff at the Siberian Tiger Park in Heilongjiang, a world leader in tiger breeding, realised that the tigers always followed the feeding truck around their enclosure, so the keepers turned into coaches and started to drive the vehicle around between meals.