my dog buddy (you may have seen him on youtube) is going on walks with me every day and what I do is I ride my bike, put buddy's harnes thing on, I put his leash on him ,then I take the end of the leash on my bike! so then buddy can run and I can bike but the best part is sometimes he pulls me up the hills lol hes gotten pretty strong he gos really fast so I get up the hills rocket speed lololololol right no his is taking a nap and btw I just got back from a walk and I was braging to everone about buddy right now he is also taking his nap right infront of the door dreaming of another walk. Buddy Loves Running/Walking