I would agree that you need a very good bond with your dog. We started Lou Lou on the bike when she was a puppy. I had a handlebar basket that she rode in. She has cycle-toured with us hundreds of miles riding in a BOB. Also she has spent a lot of time running along side the bike (or skis) in winter so we have a system down. Even then, we don't take her on the popular trails, and we have to tailor or rides to suit her. She loves everyone and everything so she is very happy to run up and say, "Hello". A dog with 'issues' might find it hard to be on a public trail and be expected to behave well while the owner is cycling. But it can be done and is very enjoyable.