You may be able to control what your dog does, you can not control the rest of the Universe. I have had idiot neighbors or their guests let unleashed dogs out of their cars, out of their doors, or even "walking" their dogs down the sidewalk unleashed. I have even had idiot neighbors dogs up on my BACK deck. When your dog is on a leash the odds are in your favor if something happens. I believe in stacking the deck when it comes to the health and safety of critters that depend on me
