The proper etiquette and managing of your pooch in a public place is a tricky subject. Far too many dog owners let their dogs roam—recklessly leaving their dogs free to approach strange humans and unknown dogs without a second thought. Now, I know your dog is probably lovely, your prized little nugget of fluffy joy—but the chances of it lashing out at a stranger are not zero. To make matters worse, every dog owner in existence will give you the “He/she is friendly!” line—whether it's true or no…