After months of struggling to get my chocolate lab to run with me, I finally found the solution... Cardio Canine.  My friend paints Labradors and on her website was your link.  I ordered the system that day and now my lab (Bones) and I are up to two miles a day and we are in the best shape of our lives. My lab is the best gift that I ever received and your system has not only given us the freedom to enjoy our evening runs, but I use it also to teach him to stay close to me in the yard and he is conscious to not leave my side when he is with me.  Sometimes I just wear the belt and he knows to stay close.  Its even flexible in size that my husband can wear it! Thanks for producing such a wonderful product.