Well. the people that I have seen do it, certainly don't do it proper, then. I just don't like it thats all, but that MHO. I run my dog on my bike, but we are out in the country and so she runs out in the field along side the dirt road while i am doing it. I have had people ask me if i had a four wheeler so that I could ride and she could run, but I don't and if I did, I wouldn't do it, because to me its just too dangerous, and I wouldn't feel comfortable doing it. But thats again, just my honest opinion.