Barefoot Company is a Swiss company that recently conducted a successful Kickstarter campaign and has started selling their “barefoot” running gear, called #FreeYourFeet (FYF). I have never worn any minimalist shoes – the closest I’ve come is wearing track spikes back in my high school days – but I thought these looked pretty cool, so I gave them a try. I received a pair to test and promptly got a kidney stone. A 9 mm kidney stone.…