I see so many people running with their dogs on cement.  Either on the sidewalk or on the street.  Have you no clue as to how bad this is for your dog?  This is especially harmful for larger breeds.  The hard cement damages bones and cartilage in the feet and shoulders and hips.  It damages their toes as well.  Why don't you run barefoot on the cement and see how your feet, knees, and hips feel!  SO JUST STOP IT!.  Take your dog to a park or a schooll and run with it there.  If you are on cement just walk, don't jog or run unless you want to cripple your dog.  I can't believe how many people do not know this.  It is just common sense.  Ask your dogs Vet how bad this is for your dog.  SO JUST STOP IT!