lol, I suppose this goes for all you with herders mainly. But Trey is a big heel nipper. When I run the dogs in the back yard running with him is like bark bark bark, heel nip, step, bark, nip, step, bark, step, bark some more, nip... Yeah, yeah typical sheltie, rofl. Is there any way to moderate this? You get the guy riled up and the first thing he does (well after bark and bark) is go straight for your heels.