I've been fortunate to take care of dogs almost all of my life. Buddy is my current partner in crime after a nearly four-year stint in a shelter. (He showed aggression towards children and was frequently overlooked by families.) It took two years to really discover his personality, and it's phenomenal. There's still some fear, but he no longer expresses it with aggression. I'll take the time to get to know your dogs, too. If (and only if) requested, I can bring Buddy along on the walk as well to give your dog both human and canine companionship. Both Buddy (30 pounds) and I are comfortable with dogs of all sizes and breeds, from Chihuahuas (which I've owned) to Great Danes. There's no such thing as a bad dog!