One of the big problem when walking dogs is that sometimes they pull too hard. It’s frustrating. The more frustration, the more the dog will pull. This often results in shoulder injuries. I speak from experience, I had two years of physio, massage and drugs because of the pulling with my previous dog.
One of the solutions is to make the dog work by making her carry stuff on a pair of saddles, like in this photo.
Dog Working: Seawall — Vancouver, BC