The big black Labrador meandered slowly up a Delmar street, much to the consternation of my client. She froze and clung to the leash, aware that her own dog would, at any moment, see the loose dog and go into a barking frenzy. We backed away, turned and worked on maintaining confidence and purpose so that her dog would not react negatively. In the meantime, the Lab, oblivious to cars stopping to let it pass, wandered away. A little Cairn Terrier stumbled down the busy street,