I'm thinking more of the coming months, it's too cold to walk in town, for doggie with fur shorter than a buzz cut...But really, how do you safely socialize a dog with stranger aggression? Not every stranger, if they approach him to pet him he gets happily waggy. It's more people passing by, joggers, bike riders, people waiting for the bus. With Sophie I avoid other dogs on leash, but Callie is pretty good about other dogs and doesn't even notice squirrels. But avoiding people? I'd like to work with him on this...suggestions???