Snake and I race through the woods... she is more agile but my legs are longer so we are around about the same speed. Sometimes she cheats and cuts through the trees. We also play tag, but she hates being 'it' so normally I'm the one chasing her!! I wouldn't be able to stomach taking her out on a harness, in my opinion it is too strange to see such an independant animal restrained by a lead. That doesn't mean I am against harnesses, but you won't find me on the end of the leash.... It's definitely better than keeping them inside all the time!